Update READMEs to emphasize batch files as entry points

Each folder README now has:
- Quick Start section with batch file commands
- Batch Launchers table listing entry points
- PowerShell Scripts section for detailed documentation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

registry-backup/README.md

@@ -2,7 +2,28 @@
 
 Scripts for backing up GE Aircraft Engines registry keys for disaster recovery and auditing.
 
-## Scripts
+## Quick Start
+
+```batch
+Backup-GERegistry.bat
+```
+
+Or with custom backup path:
+```batch
+Backup-GERegistry.bat "\\server\share\backups"
+```
+
+---
+
+## Batch Launchers (Entry Points)
+
+| Batch File | Purpose |
+|------------|---------|
+| `Backup-GERegistry.bat` | Main launcher for registry backup |
+
+---
+
+## PowerShell Scripts
 
 ### Backup-GERegistry.ps1
 **GE Registry backup utility** - Backs up GE Aircraft Engines registry keys from both 32-bit and 64-bit locations.