Implement base Architect command class

[ibourgeois]

Context

As a developer building Architect commands, I need a base command class that handles package resolution and namespace mapping for artisan command extensions.

Acceptance Criteria

• Create ArchitectCommand base class extending Laravel's Command
• Implement package parameter resolution logic
• Add namespace resolution based on package parameter
• Add path resolution for generated files (src/, tests/, etc.)
• Document how to extend the base command for specific artisan commands
• Add unit tests for parameter and namespace resolution