Add Doxygen configuration and documentation workflow

- Introduced a new Doxyfile for generating documentation for the cpp-core project, specifying project details and output settings.
- Removed the outdated GitHub Actions workflow for building WASM binaries.
- Added a new GitHub Actions workflow for generating and deploying Doxygen documentation to GitHub Pages, including steps for installation and documentation generation.

These changes enhance project documentation and streamline the deployment process for generated docs.

Author: Katze719

.github/workflows/build.yml

@@ -0,0 +1,49 @@
+name: 'Generate & Deploy Doxygen Docs'
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - 'include/**'
+      - 'Doxyfile'
+      - '.github/workflows/doxygen.yml'
+  workflow_dispatch:
+
+# Required for GitHub Pages deployment
+permissions:
+  contents: write        # to push gh-pages for classic page
+  pages: write           # to deploy using actions/deploy-pages@v1
+  id-token: write        # to authenticate deployment
+
+jobs:
+  build-docs:
+    runs-on: ubuntu-latest
+    name: 'Build Doxygen HTML'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install Doxygen + Graphviz
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -y doxygen graphviz
+
+      - name: Generate documentation
+        run: |
+          doxygen -v
+          doxygen Doxyfile
+
+      # Upload the generated site as an artifact for the deploy job
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: docs/html
+
+  deploy:
+    needs: build-docs
+    runs-on: ubuntu-latest
+    name: 'Deploy to GitHub Pages'
+    steps:
+      - name: Deploy
+        id: deployment
+        uses: actions/deploy-pages@v1 

.github/workflows/doxygen.yml

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+#--------------------------------------------------------------------------
+# Doxyfile – generated for cpp-core                                     
+#--------------------------------------------------------------------------
+
+# Project related --------------------------------------------------------
+PROJECT_NAME           = "cpp-core"
+PROJECT_BRIEF          = "Header-only C++ helper library"
+PROJECT_NUMBER         = "1.0"
+OUTPUT_DIRECTORY       = docs/html
+CREATE_SUBDIRS         = NO
+
+# Build options ----------------------------------------------------------
+EXTRACT_ALL            = YES
+EXTRACT_PRIVATE        = YES
+EXTRACT_STATIC         = YES
+EXTRACT_ANON_NSPACES   = YES
+
+# Source files -----------------------------------------------------------
+INPUT                  = include README.md LICENSE
+FILE_PATTERNS          = *.h *.hpp *.md
+RECURSIVE              = YES
+
+# HTML output ------------------------------------------------------------
+GENERATE_HTML          = YES
+HTML_OUTPUT            = .
+HTML_COLORSTYLE_HUE    = 220
+HTML_COLORSTYLE_SAT    = 100
+HTML_COLORSTYLE_GAMMA  = 80
+
+# Disable unwanted output -----------------------------------------------
+GENERATE_LATEX         = NO
+GENERATE_MAN           = NO
+GENERATE_RTF           = NO
+GENERATE_XML           = NO
+
+# Diagrams --------------------------------------------------------------
+HAVE_DOT               = YES
+DOT_IMAGE_FORMAT       = svg
+CALL_GRAPH             = YES
+CALLER_GRAPH           = YES
+
+# Misc ------------------------------------------------------------------
+FULL_PATH_NAMES        = NO
+STRIP_FROM_PATH        = include
+GENERATE_TREEVIEW      = YES