ci: consolidate docs deployment workflows and add PR previews

Signed-off-by: Aritra Dey <[email protected]>

Author: AritraDey-Dev

.github/workflows/build.yml

@@ -0,0 +1,51 @@
+name: Publish Docs
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+    types: [opened, synchronize, reopened, closed]
+
+permissions:
+  contents: write
+  pull-requests: write
+  statuses: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js 
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install and Build 🔧
+        run: |
+          npm ci
+          npm run build
+
+      - name: Deploy Preview deploy-preview 🚀
+        if: github.event_name == 'pull_request'
+        uses: rossjrw/pr-preview-action@v1
+        with:
+          source-dir: ./docusaurus/
+          preview-branch: gh-pages-pr-previews
+          umbrella-dir: pr-preview
+          action: auto
+
+      - name: Deploy to GitHub Pages 🚀
+        if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: gh-pages
+          folder: build