feat: implement pdodb init command with interactive wizard

- Add interactive wizard for project initialization
- Support .env and config/db.php configuration formats
- Generate database connection configuration
- Create directory structure (migrations, models, repositories, services, seeds)
- Support advanced options (cache, performance, table prefix)
- Add connection testing with retry option
- Remove 'Both files' option as PDOdb uses either .env OR config/db.php
- Fix duplicate [value] in interactive prompts
- Add comprehensive tests and documentation
- Update bash completion for init command
- Add examples for repository, service, and init commands

Author: tommyknocker

.gitignore

@@ -28,3 +28,6 @@ infection-summary.txt
 
 # Migrations directory (user-generated files)
 /migrations/
+
+# File-based cache directory
+/storage/