Fix Doxygen missing README.md + publish_dir in workflow

Author: ramsafin

.github/workflows/docs.yml

@@ -36,6 +36,6 @@ jobs:
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: build/gcc-RelWithDebInfo/docs/html
+          publish_dir: ./docs/html
           publish_branch: gh-pages
           force_orphan: true

Doxyfile

@@ -943,7 +943,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = include src
+INPUT                  = README.md include/ src/
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses