chore(.github): added workflow for building mdbook

Author: codedsprit

.github/workflows/mdbook-build.yml

@@ -0,0 +1,41 @@
+
+
+name: MdBook Build and Deploy
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: write
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+      
+      - name: Install Nix package manager
+        uses: DeterminateSystems/nix-installer-action@main  
+
+      - name: Build the book using Nix
+        run: |
+          nix build .#mdbookBuild
+          ls -la result
+
+      - name: Copy build result
+        run: |
+          mkdir -p build_output
+          cp -r result/* build_output
+
+      - name: Deploy build to gh-pages branch
+        uses: crazy-max/ghaction-github-pages@v4
+        with:
+          target_branch: gh-pages
+          build_dir: build_output
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}