Allow a Component to be a managed class instance, managed class, or managed module

[andyk]

Currently, a Component can be either a managed class or a managed class instance. The instantiate: bool decides which it is, per:

agentos/agentos/component.py

Lines 40 to 48 in 0f3d437

	def __init__(
	self,
	managed_cls: Type[T],
	repo: Repo,
	identifier: "Component.Identifier",
	class_name: str,
	file_path: str,
	requirements_path: str = None,
	instantiate: bool = True,

Allowing a component to manage a module would require relatively small change (we already load the module in) and unlock a significant functionality & flexibility.

I propose we support this by making the class_name parameter to Component.__init__() (and any related factory methods) optional, and then if class_name isn't provided then the component is a managed module.