magicbot: Inject into component __init__

[auscompgeek]

See #21

A good motivating example could look something like the following:

class Vision:
	def __init__(self, name: str):
		self.camera = PhotonCamera(name)

	def execute(self): ...

class Robot(MagicRobot):
	vision: Vision

	def createObjects(self):
		self.vision_name = 'camera'

Of course, it could also be used like this, to make things less magic:

@dataclass
class Chassis:
	module_a: SwerveModule
	module_b: SwerveModule
	module_c: SwerveModule

	def __post_init__(self): ...

	def execute(self): ...

class Robot(MagicRobot):
	chassis: Chassis

	def createObjects(self):
		self.chassis_module_a = SwerveModule(...)
		self.chassis_module_b = SwerveModule(...)
		self.chassis_module_c = SwerveModule(...)

[virtuald]

LGTM