docs: Add branch consolidation plan and scripts

scripts/consolidate-branches.ps1

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+# Branch Consolidation Script
+# Consolidates all Dependabot branches into main
+
+Write-Host "Starting branch consolidation..." -ForegroundColor Green
+
+# Fetch latest from remote
+Write-Host "Fetching latest from remote..." -ForegroundColor Yellow
+git fetch Origin
+
+# Get current branch
+$currentBranch = git rev-parse --abbrev-ref HEAD
+Write-Host "Current branch: $currentBranch" -ForegroundColor Cyan
+
+# Ensure we're on main
+if ($currentBranch -ne "main") {
+    Write-Host "Switching to main branch..." -ForegroundColor Yellow
+    git checkout main
+}
+
+# Get all Dependabot branches
+$dependabotBranches = git branch -r --list "Origin/dependabot/*" | ForEach-Object { $_.Trim() }
+
+Write-Host "`nFound Dependabot branches:" -ForegroundColor Cyan
+$dependabotBranches | ForEach-Object { Write-Host "  - $_" }
+
+Write-Host "`nNote: Dependabot branches should be merged via GitHub PRs" -ForegroundColor Yellow
+Write-Host "This script prepares the consolidation plan." -ForegroundColor Yellow
+
+# Create summary
+$summary = @"
+# Branch Consolidation Summary
+
+## Dependabot Branches Found
+$($dependabotBranches.Count) branches
+
+## Next Steps
+1. Review Dependabot PRs on GitHub
+2. Test each dependency update
+3. Merge approved PRs
+4. Clean up merged branches
+
+"@
+
+Write-Host "`n$summary" -ForegroundColor Green
+
+Write-Host "`nConsolidation plan created!" -ForegroundColor Green
+