Initial commit: Database Backup Tool v1.1.0

- PostgreSQL and MySQL support
- Interactive TUI with fixed menu navigation
- Line-by-line progress display
- CPU-aware parallel processing
- Cross-platform build support
- Configuration settings menu
- Silent mode for TUI operations

.gitignore

@@ -0,0 +1,10 @@
+# Ignore backup artifacts and logs in project subdir
+pg_backups/
+*.tar.gz
+*.dump
+*.sql
+logs/
+*.log
+*.out
+*.trace
+*.err