Add resolved path and base directory to the base Loader class

[Schamper]

This pattern of resolving the path and getting the base address is very often repeated across loaders. It should be added to the base Loader class:

dissect.target/dissect/target/loaders/vmx.py

Lines 14 to 19 in 789009d

	def __init__(self, path, **kwargs):
	path = path.resolve()
	super().__init__(path)
	self.vmx = vmx.VMX.parse(path.read_text())
	self.base_dir = path.parent