Agent skill, license/publish template options, repo CI, and modernization (tbd v0.2.3) #4

Job	Run time
skill-validate	26s
format-check	7s
render-test (default)	12s
render-test (no-publish-proprietary, --data package_license=Proprietary --data publish_to_pypi=fa...	13s
render-test (no-license, --data package_license=None)	14s
update-path	11s
	1m 23s

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