Add GitHub Sync - Automated repository synchronization tool

Complete implementation of automated GitHub repository synchronization:
- Webhook-based auto-sync from GitHub
- Multi-repository support with branch selection
- Web dashboard for management
- Manual sync and rollback functionality
- Comprehensive logging and monitoring

Located in /gitpusher/ subdirectory as standalone application.

gitpusher/.gitignore

@@ -0,0 +1,24 @@
+# Data files (contains secrets and logs)
+data/*.json
+
+# Log files
+*.log
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Temporary files
+*.tmp
+*.temp
+
+# Backup files
+*.backup
+*.bak