ci(pages): add GitHub Pages deployment workflow

Add automated deployment to GitHub Pages using GitHub Actions.
Workflow triggers on push to main branch and builds the site from .github/pages directory.

Author: tonidy

.github/pages/_config.yml

@@ -0,0 +1,5 @@
+title: Standard .NET Project Layout
+description: An opinionated .NET project layout inspired by industry patterns and best practices for .NET repositories.
+theme: null
+exclude:
+  - README.md

.github/workflows/deploy-pages.yml

@@ -0,0 +1,48 @@
+name: Deploy GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+
+      - name: Build with Jekyll
+        uses: actions/jekyll-build-pages@v1
+        with:
+          source: ./.github/pages
+          destination: ./_site
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v4
+        with:
+          path: ./_site
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4