Documentation using Doxygen (#20)

* Saving automated documentation to gh-pages branch using Doxygen
* Restrict to pushing documentation to changes on master

Author: prestoncarman

.github/workflows/gh-pages.yaml

@@ -0,0 +1,23 @@
+name: github pages
+
+on:
+  push:
+    branches:
+      - master  # Set a branch name to trigger deployment
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: mattnotmitt/doxygen-action@v1
+        with:
+            working-directory: '.'
+            doxyfile-path: './Doxyfile'
+      
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./public/html/

.gitignore

@@ -26,3 +26,6 @@ Gemfile.lock
 .bundle/*
 vendor/*
 *.cpp.bin*
+
+# Doxygen Generated Files
+public