Add creation of gh-pages worktree to docs build (see https://olgarithms.github.io/sphinx-tutorial/docs/7-hosting-on-github-pages.html)

Added section to readme on manually updating the docs
Remove *.zh-cn.* as they have not been updated to be specific to YggdrasilRapidJSON
Added workflow to build/deploy docs

Author: langmm

.github/workflows/docs.yml

@@ -0,0 +1,32 @@
+name: Build the docs & publish to GitHub Pages
+'on':
+  push:
+    branches:
+      - docs
+    tags:
+      - 'v*'
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    contents: write
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v5
+        with:
+          submodules: true
+      - name: Configure git
+        run: |
+          git config --global user.name 'Meagan Lang'
+          git config --global user.email 'langmm.astro@gmail.com'
+      - name: Build
+        run: |
+          mkdir build
+          cd build
+          cmake .. -DRAPIDJSON_BUILD_DOC=ON -DRAPIDJSON_BUILD_EXAMPLES=OFF -DRAPIDJSON_BUILD_TESTS=OFF
+          cmake --build .
+      - name: Add changes & push to deploy
+        run: |
+          cd build/doc/html
+          git add -A
+          git commit --allow-empty -m "Updated docs [via GitHub Action]"
+          git push origin gh-pages

doc/CMakeLists.txt

@@ -8,13 +8,12 @@ ELSE()
     list(APPEND MARKDOWN_DOC ${CMAKE_CURRENT_LIST_DIR}/../readme.md)
 
     CONFIGURE_FILE(Doxyfile.in Doxyfile @ONLY)
-    CONFIGURE_FILE(Doxyfile.zh-cn.in Doxyfile.zh-cn @ONLY)
 
     file(GLOB DOXYFILES ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile*)
-    
+
     add_custom_command(OUTPUT html
+        COMMAND git worktree add -f ${CMAKE_CURRENT_BINARY_DIR}/html gh-pages
         COMMAND ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
-        COMMAND ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile.zh-cn
         COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/html
         DEPENDS ${MARKDOWN_DOC} ${SOURCES} ${DOXYFILES}
         WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}/../