Add Skill

@../find-skills/SKILL.md

Installing from a GitHub Path or URL

If given a short path like github/awesome-copilot/git-commit or a full URL like https://github.com/github/awesome-copilot/tree/main/skills/git-commit or https://www.skills.sh/github/awesome-copilot/git-commit, derive the install command as follows:

For the short path, owner/repo is the first two segments and skill-name is the third. For a full URL, owner/repo comes after github.com/ and skill-name is the last path segment.