Clone skill locally instead of multiple GH API Calls

[NeonDaniel]

Specifically in install_skill_from_url, it would be more efficient to clone the repository and then parse the SkillEntry from the local directory, rather than multiple calls to Github

[JarbasAl]

any other places where this might make sense? i suppose anything doing more than 1 api call might be worth considering, not in individual methods but in places several methods are called in a row

[NeonDaniel]

Without digging too deeply:

• skill_entry.skill_entry_from_url
• github.get_skill_data

[NeonDaniel]

Just revisiting this, we only need the GH API to tell us which commit we want, everything else can be parsed from the URL or downloaded repository