Project setup (#2)

* Added git submodules

* Added basic project setup

* Added cmake configurations

* Added scripts for presets generation

* Added dummy example to `flux-playground` module

.clang-format

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+
+---
+BasedOnStyle:                                   LLVM
+AccessModifierOffset:                           -4
+ColumnLimit:                                    100
+ConstructorInitializerIndentWidth:              8
+ContinuationIndentWidth:                        8
+IndentPPDirectives:                             AfterHash
+IndentWidth:                                    4
+PointerAlignment:                               Left
+ReflowComments:                                 true
+Standard:                                       c++20
+UseTab:                                         Never
+AlignConsecutiveAssignments:                    Consecutive
+AlignConsecutiveBitFields:                      true
+AlignConsecutiveDeclarations:                   true
+AlignConsecutiveMacros:                         true
+AllowShortBlocksOnASingleLine:                  Empty
+AllowShortCaseLabelsOnASingleLine:              false
+AllowShortFunctionsOnASingleLine:               Empty
+AllowShortIfStatementsOnASingleLine:            Never
+AllowShortLambdasOnASingleLine:                 Empty
+AllowShortLoopsOnASingleLine:                   false
+BreakConstructorInitializers:                   BeforeColon
+FixNamespaceComments:                           true
+---
+Language:                                       Cpp
+---
+Language:                                       ObjC
+ObjCSpaceBeforeProtocolList:                    false

.gitignore

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+#=======================================================================================================================
+
+# The clangd compilation database. This is a soft link, it's generated automatically during the build.
+compile_commands.json
+
+# The build options used by VSCode (aka CMake Variants). This file is generated by scripts/generate-cmake-variants.sh.
+cmake-variants.yaml
+
+# The build options used by VSCode (aka CMake Presets). This file is generated by scripts/generate-cmake-presets.sh.
+CMakePresets.json
+
+# Build folder used by CI/CD tools.
+build/
+build-linux/
+build-windows/
+build-macos/
+
+# The cache used by clangd.
+.cache/
+
+# NOTE: don't commit anything JetBrains IDE-related. We may revisit this in the future.
+.idea/
+
+# NOTE: not sure which library does this, but something creates the 'deps' folder in our project's root folder.
+deps/
+
+#=======================================================================================================================
+# Visual Studio Code
+#=======================================================================================================================
+
+.vscode/*
+# !.vscode/settings.json
+# !.vscode/tasks.json
+# !.vscode/launch.json
+# !.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+
+#=======================================================================================================================
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+#=======================================================================================================================
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# CMake
+cmake-build-*/
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+# ImGui files
+imgui.ini

.gitmodules

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+[submodule "external/Catch2"]
+	path = external/Catch2
+	url = https://github.com/catchorg/Catch2
+	branch = v2.x
+[submodule "external/imgui"]
+	path = external/imgui
+	url = https://github.com/ocornut/imgui.git
+	branch = docking
+[submodule "external/glfw"]
+	path = external/glfw
+	url = https://github.com/glfw/glfw.git
+[submodule "external/glad"]
+	path = external/glad
+	url = https://github.com/Dav1dde/glad.git
+[submodule "external/glm"]
+	path = external/glm
+	url = https://github.com/g-truc/glm
+[submodule "external/entt"]
+	path = external/entt
+	url = https://github.com/skypjack/entt.git
+[submodule "external/fast_io"]
+	path = external/fast_io
+	url = https://github.com/cppfastio/fast_io.git

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.23)
+
+project(flux LANGUAGES CXX)
+
+include("cmake/project_settings.cmake")
+include("cmake/bootstrap.cmake")
+
+#-----------------------------------------------------------------------------------------------------------------------
+# Enable code coverage.
+#-----------------------------------------------------------------------------------------------------------------------
+
+option(FLUX_ENABLE_COVERAGE "Enable code coverage" OFF)
+
+if(FLUX_ENABLE_COVERAGE)
+    if(CMAKE_CXX_COMPILER_ID MATCHES "^(Apple)?(C|c)?lang$")
+        string(APPEND CMAKE_C_FLAGS   " -O0 -g -fprofile-instr-generate -fcoverage-mapping")
+        string(APPEND CMAKE_CXX_FLAGS " -O0 -g -fprofile-instr-generate -fcoverage-mapping")
+
+        message(STATUS "Code coverage: ON")
+    else()
+        message(ERROR "Code coverage for compiler ${CMAKE_CXX_COMPILER_ID} is unsupported")
+    endif()
+endif()
+
+#-----------------------------------------------------------------------------------------------------------------------
+# Libraries.
+#-----------------------------------------------------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------------------------------------------------
+# Applications.
+#-----------------------------------------------------------------------------------------------------------------------
+
+add_subdirectory("flux-playground")
+
+# code: language="CMake" insertSpaces=true tabSize=4