Create gatsby.yml (#205)

## Description
<!-- Briefly describe what this PR adds or changes. -->

## Type of Change
- [ ] 🆕 New prompt addition
- [ ] 🔧 Prompt improvement/fix
- [ ] 🎨 UI component (React/Tailwind)
- [ ] 🧪 Feature implementation
- [ ] 📋 Documentation update
- [ ] 🗂️ Category organization
- [ ] 🐛 Bug fix
- [ ] 🔒 Security fix
- [ ] Other: ___________

## Category
<!-- Which category does this affect? -->
- [ ] ui-design
- [ ] web-development
- [ ] components
- [ ] ux-research
- [ ] animation
- [ ] responsive
- [ ] accessibility
- [ ] src/ (codebase change)
- [ ] supabase/ (backend change)

## Brand Alignment (for UI/component changes)
<!-- Does this change maintain the "Clinical Luxury" brand DNA? -->
- [ ] Uses Soft Ivory (#F8F8FF) as the background canvas
- [ ] Uses Deep Maroon (#800020) for primary actions and headers
- [ ] Uses Shiny Gold (#C5A028) for 1px borders and hover states (the
"Gold Stitch")
- [ ] Uses Dark Charcoal (#333333) for body text
- [ ] Supports RTL layout for Arabic localization
- [ ] N/A — no visual changes

## Checklist

### For New Prompts
- [ ] Prompt follows the established format (YAML frontmatter +
sections)
- [ ] Includes clear description
- [ ] Contains example usage
- [ ] Provides sample output (if applicable)
- [ ] Has appropriate tags
- [ ] Tested with Claude
- [ ] Placed in correct category directory
- [ ] Frontend-focused content

### For Code Changes
- [ ] `npm run lint` passes with 0 errors
- [ ] `npm run build` completes without errors
- [ ] RTL (Arabic) layout is not broken
- [ ] Mobile responsive on all breakpoints
- [ ] Tailwind uses semantic tokens (not raw hex values)

### For All Contributions
- [ ] Clear and understandable content
- [ ] No spelling or grammar errors
- [ ] Follows contribution guidelines
- [ ] No duplicate content
- [ ] No sensitive credentials or API keys committed

## Testing
- [ ] I have tested this locally
- [ ] The changes produce consistent, expected results
- [ ] The examples work as described (for prompts)
- [ ] Verified on mobile viewport

## Additional Notes
<!-- Add any additional context, screenshots, or information about your
changes here. -->

<!-- closes #[issue-number] -->

Author: asperpharma

.github/workflows/gatsby.yml

@@ -0,0 +1,98 @@
+# Sample workflow for building and deploying a Gatsby site to GitHub Pages
+#
+# To get started with Gatsby see: https://www.gatsbyjs.com/docs/quick-start/
+#
+name: Deploy Gatsby site to Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["main"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+# Default to bash
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Detect package manager
+        id: detect-package-manager
+        run: |
+          if [ -f "${{ github.workspace }}/yarn.lock" ]; then
+            echo "manager=yarn" >> $GITHUB_OUTPUT
+            echo "command=install" >> $GITHUB_OUTPUT
+            exit 0
+          elif [ -f "${{ github.workspace }}/package.json" ]; then
+            echo "manager=npm" >> $GITHUB_OUTPUT
+            echo "command=ci" >> $GITHUB_OUTPUT
+            exit 0
+          else
+            echo "Unable to determine package manager"
+            exit 1
+          fi
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: ${{ steps.detect-package-manager.outputs.manager }}
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v5
+        with:
+          # Automatically inject pathPrefix in your Gatsby configuration file.
+          #
+          # You may remove this line if you want to manage the configuration yourself.
+          static_site_generator: gatsby
+      - name: Restore cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            public
+            .cache
+          key: ${{ runner.os }}-gatsby-build-${{ hashFiles('public') }}
+          restore-keys: |
+            ${{ runner.os }}-gatsby-build-
+      - name: Install dependencies
+        run: ${{ steps.detect-package-manager.outputs.manager }} ${{ steps.detect-package-manager.outputs.command }}
+      - name: Build with Gatsby
+        env:
+          PREFIX_PATHS: 'true'
+        run: ${{ steps.detect-package-manager.outputs.manager }} run build
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./public
+
+  # Deployment job
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v5
+