fix: remove *.txt in git ignore

.gitignore

@@ -19,4 +19,4 @@ lib
 *.gcno
 *.gcda
 *.o
-*.txt
+scores.txt

games/nibbler/CMakeLists.txt

@@ -0,0 +1,24 @@
+project(nibbler)
+add_library(${PROJECT_NAME} SHARED
+        export.cpp
+        src/NibblerGameProvider.cpp
+        src/NibblerGame.cpp
+        src/entities/nibbler/Nibbler.cpp
+        src/entities/nibbler/Nibbler.hpp
+        src/entities/nibbler/TailEntity.cpp
+        src/entities/nibbler/TailEntity.hpp
+        src/entities/nibbler/HeadEntity.cpp
+        src/entities/nibbler/HeadEntity.hpp
+        src/entities/nibbler/components/HeadKeyboardComponent.cpp
+        src/entities/nibbler/components/HeadKeyboardComponent.hpp
+        src/entities/wall/WallEntity.cpp
+        src/entities/wall/WallEntity.hpp
+        src/entities/background/BackgroundEntity.cpp
+        src/entities/background/BackgroundEntity.hpp
+        src/entities/apple/AppleEntity.cpp
+        src/entities/apple/AppleEntity.hpp
+)
+add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/../common PRIVATE)
+target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_LIST_DIR}/src)
+target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_LIST_DIR}/../..)
+target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_LIST_DIR}/..)