Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>

externals/simpleini/.github/workflows/build-doxygen.yml

@@ -0,0 +1,24 @@
+name: Build Doxygen Docs
+
+on:
+  workflow_run:
+    workflows: ["Build and Test"]
+    types:
+      - completed
+
+jobs:
+  deploy:
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Install Doxygen
+      run: sudo apt-get update && sudo apt-get install -y doxygen graphviz
+    - name: Generate Doxygen Documentation
+      run: doxygen Doxyfile
+    - name: Deploy to GitHub Pages
+      uses: peaceiris/actions-gh-pages@v3
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./docs/html