Add argparse CLIs for parser and validator#9

KristopherKubicki wants to merge 1 commit intomasterGapIntelligence/DAR-Schema:masterfrom

codex/refactor-dar_parser.py-and-dar_validator.py-with-argparseGapIntelligence/DAR-Schema:codex/refactor-dar_parser.py-and-dar_validator.py-with-argparseCopy head branch name to clipboard