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/.htaccess

@@ -0,0 +1,14 @@
+# Deny access to data directory from web
+<FilesMatch "^(data|src)">
+    Require all denied
+</FilesMatch>
+
+# Deny access to sensitive files
+<FilesMatch "\.(json|log|ini|conf)$">
+    Require all denied
+</FilesMatch>
+
+# Protect .git directory if exists
+<DirectoryMatch "\.git">
+    Require all denied
+</DirectoryMatch>