ci: add workflows description

.github/workflows/build.yaml

@@ -1,7 +1,12 @@
+# This workflow is used for manual (can be triggered via GitHub web interface)
+# build of package archives for distribution. The build workflow 
+# (.github/workflows/reusable-build.yaml) is triggered for creation wheel and 
+# sdist package archives. 
+
 name: Build python package manually
 on:
   workflow_dispatch
 
 jobs:
   build:
-    uses: qua-platform/qualibrate-runner/.github/workflows/reusable-buld.yaml@main
+    uses: qua-platform/qualibrate-runner/.github/workflows/reusable-build.yaml@main

.github/workflows/check.yaml

@@ -1,3 +1,7 @@
+# This workflow is used for automatically running checks on adding commit to 
+# pull requests. This workflow triggers poe (poethepoet) commands: type, lint, 
+# format. The commands are defined in pyproject.toml.
+
 name: Format; lint; type; tests
 on:
   pull_request

.github/workflows/release.yaml

@@ -1,3 +1,8 @@
+# This workflow is used for creating draft release on GitHub. Firstly the
+# build workflow (.github/workflows/reusable-buld.yaml) is triggered for 
+# creation wheel and sdist package archives. Then the draft GitHub release is
+# created with attached built python package archives.
+
 name: Create release
 
 on:

.github/workflows/reusable-buld.yaml → .github/workflows/reusable-build.yaml

@@ -1,3 +1,8 @@
+# This workflow is used for building qualibrate-runner python package in dist
+# and wheel formats. Built archives is attached to run as artifacts. The 
+# workflow should only be automatically triggered by other workflows (manual 
+# build and release).
+
 name: Build python package
 on:
   workflow_call