feat(docs): added footer for page navigation, i18n for docs (#1339)

* update infra and remove railway

* feat(docs): added footer for page navigation, i18n for docs

* Revert "update infra and remove railway"

This reverts commit abfa2f8d51.

* added SEO-related stuff

* fix image sizes

* add missing pages

* remove extraneous comments

.github/workflows/i18n.yml

@@ -0,0 +1,126 @@
+name: 'Auto-translate Documentation'
+
+on:
+  push:
+    branches: [ main ]
+    paths: 
+      - 'apps/docs/content/docs/en/**'
+      - 'apps/docs/i18n.json'
+  pull_request:
+    branches: [ main ]
+    paths: 
+      - 'apps/docs/content/docs/en/**'
+      - 'apps/docs/i18n.json'
+  workflow_dispatch: # Allow manual triggers
+
+jobs:
+  translate:
+    runs-on: ubuntu-latest
+    if: github.actor != 'github-actions[bot]' # Prevent infinite loops
+    
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          fetch-depth: 0
+      
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+      
+      - name: Run Lingo.dev translations
+        env:
+          LINGODOTDEV_API_KEY: ${{ secrets.LINGODOTDEV_API_KEY }}
+        run: |
+          cd apps/docs
+          bunx lingo.dev@latest i18n
+      
+      - name: Check for translation changes
+        id: changes
+        run: |
+          cd apps/docs
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          
+          if [ -n "$(git status --porcelain content/docs)" ]; then
+            echo "changes=true" >> $GITHUB_OUTPUT
+          else
+            echo "changes=false" >> $GITHUB_OUTPUT
+          fi
+      
+      - name: Commit and push translation updates
+        if: steps.changes.outputs.changes == 'true'
+        run: |
+          cd apps/docs
+          git add content/docs/es/ content/docs/fr/ content/docs/zh/ i18n.lock
+          git commit -m "feat: update translations"
+          git push origin ${{ github.ref_name }}
+      
+      - name: Create Pull Request (for feature branches)
+        if: steps.changes.outputs.changes == 'true' && github.event_name == 'pull_request'
+        uses: peter-evans/create-pull-request@v5
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: "feat: update translations"
+          title: "🌐 Auto-update translations"
+          body: |
+            ## Summary
+            Automated translation updates for documentation.
+            
+            - Updated translations for modified English content
+            - Generated using Lingo.dev AI translation
+            - Maintains consistency with source documentation
+            
+            ## Test Plan
+            - [ ] Verify translated content accuracy
+            - [ ] Check that all links and references work correctly
+            - [ ] Ensure formatting and structure are preserved
+          branch: auto-translations
+          base: ${{ github.base_ref }}
+          labels: |
+            i18n
+            auto-generated
+
+  verify-translations:
+    needs: translate
+    runs-on: ubuntu-latest
+    if: always() # Run even if translation fails
+    
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+      
+      - name: Install dependencies
+        run: |
+          cd apps/docs
+          bun install
+      
+      - name: Build documentation to verify translations
+        run: |
+          cd apps/docs
+          bun run build
+      
+      - name: Report translation status
+        run: |
+          cd apps/docs
+          echo "## Translation Status Report" >> $GITHUB_STEP_SUMMARY
+          
+          en_count=$(find content/docs/en -name "*.mdx" | wc -l)
+          es_count=$(find content/docs/es -name "*.mdx" 2>/dev/null | wc -l || echo 0)
+          fr_count=$(find content/docs/fr -name "*.mdx" 2>/dev/null | wc -l || echo 0)
+          zh_count=$(find content/docs/zh -name "*.mdx" 2>/dev/null | wc -l || echo 0)
+          
+          es_percentage=$((es_count * 100 / en_count))
+          fr_percentage=$((fr_count * 100 / en_count))
+          zh_percentage=$((zh_count * 100 / en_count))
+          
+          echo "- **🇪🇸 Spanish**: $es_count/$en_count files ($es_percentage%)" >> $GITHUB_STEP_SUMMARY
+          echo "- **🇫🇷 French**: $fr_count/$en_count files ($fr_percentage%)" >> $GITHUB_STEP_SUMMARY
+          echo "- **🇨🇳 Chinese**: $zh_count/$en_count files ($zh_percentage%)" >> $GITHUB_STEP_SUMMARY