Update docstrings across all methods to be consistent

[t1m0thyj]

Some methods already have thorough documentation, for example:

zowe-client-python-sdk/src/zos_files/zowe/zos_files_for_zowe_sdk/files.py

Lines 148 to 171 in 5816aab

	def copy_uss_to_dataset(
	self, from_filename, to_dataset_name, to_member_name=None, type=FileType.TEXT, replace=False
	):
	"""
	Copy a USS file to dataset.
	Parameters
	----------
	from_filename: str
	Name of the file to copy from.
	to_dataset_name: str
	Name of the dataset to copy to.
	to_member_name: str
	Name of the member to copy to.
	type: FileType, optional
	Type of the file to copy from. Default is FileType.TEXT.
	replace: bool, optional
	If true, members in the target dataset are replaced.
	Returns
	-------
	json
	A JSON containing the result of the operation.
	"""

Others have none or very little docs written, so we should update their docs to be consistent.

The docstrings should be formatted so that they render nicely in our auto-generated ReadTheDocs:
https://zowe-client-python-sdk.readthedocs.io/en/latest/packages/packages.html

[github-actions]

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