feat(md): add --format flag for rev-iso/legacy filename formats#69

MrDwarf7 wants to merge 4 commits into

afar1:mainafar1/fieldtheory-cli:mainfrom

MrDwarf7:mrdwarf7/cli-optionsMrDwarf7/fieldtheory-cli:mrdwarf7/cli-optionsCopy head branch name to clipboard