feat: Add forge cleanup tools and documentation (#1128)

## Summary
Implements forge cleanup tools and documentation as requested in issue #1128.

## Changes
- scripts/cleanup-duplicate-prs.sh: Automated duplicate PR detection
- docs/forge-cleanup-analysis.md: Analysis of duplicate PRs
- docs/forge-cleanup-report.md: Cleanup report with metrics
- .github/workflows/pr-duplicate-check.yml: Weekly automated checks

Issue: #1128

.github/workflows/pr-duplicate-check.yml

@@ -0,0 +1,69 @@
+name: Duplicate PR Detection
+
+on:
+  schedule:
+    # Run weekly on Monday at 9 AM UTC
+    - cron: '0 9 * * 1'
+  workflow_dispatch: # Allow manual trigger
+  pull_request:
+    types: [opened, reopened]
+
+jobs:
+  check-duplicates:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y jq curl
+
+      - name: Check for duplicate PRs
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+          GITEA_URL: ${{ secrets.GITEA_URL || 'https://forge.alexanderwhitestone.com' }}
+          REPO: ${{ github.repository }}
+        run: |
+          chmod +x ./scripts/cleanup-duplicate-prs.sh
+          ./scripts/cleanup-duplicate-prs.sh --dry-run
+
+      - name: Create issue if duplicates found
+        if: failure()
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const title = 'Duplicate PRs Detected';
+            const body = `## Duplicate PRs Found
+            
+            The duplicate PR detection workflow found potential duplicate PRs.
+            
+            **Action Required:**
+            1. Review the duplicate PRs
+            2. Close older duplicates
+            3. Keep the newest PR for each issue
+            
+            **Workflow Run:** ${context.runId}
+            **Repository:** ${context.repo.owner}/${context.repo.repo}
+            
+            This issue was automatically created by the duplicate PR detection workflow.`;
+            
+            await github.rest.issues.create({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              title,
+              body,
+              labels: ['maintenance', 'automated']
+            });
+
+  # Notify on manual trigger
+  notify:
+    needs: check-duplicates
+    if: github.event_name == 'workflow_dispatch'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Send notification
+        run: |
+          echo "Duplicate PR check completed"
+          echo "Check the workflow run for details"