Feat: Add make:command musket command to scaffold new commands

Background: A generator to scaffold command classes helps contributors add commands quickly and consistently.

Tasks:

• update and make the make:command <Name> command implementation fully functional (currently dummy), seeing that the current MakeCommand class is already cluttered, you may choose to create an entirely new class for this purpose.
• Generate a command template file (class with signature, description, handle method).
• Respect project conventions (file path, namespace, registration).
• Add options: --force to overwrite, --command to define the terminal command that will be used to invoke the class.
• Add tests for generator output and file creation.

Acceptance criteria:

• make:command HelloWorld creates a properly namespaced class at expected path and registers or documents how to register it.
• --force overwrites; tests validate content.

Difficulty: easy–medium