added github actions for deploying documentation

update github actions

Author: AkashS0510

.github/workflows/deploy_docs.yml

@@ -0,0 +1,37 @@
+name: Deploy Documentation Site
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v3
+      with:
+        node-version: '18'
+
+    - name: Change directory to documentation
+      run: cd documentation
+
+    - name: Install dependencies
+      run: yarn install
+
+    - name: Build documentation site
+      run: yarn build
+
+    - name: Deploy to GitHub Pages
+      uses: peaceiris/actions-gh-pages@v3
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./build