RTECO-1011 - Improve skill commands

[udaykb2]

Overview

Improve "skills list" and "skills update" command

Improvement in SKILLS LIST

• For every install inside skills, a file is created ./jfrog/skill-info.json, which contains information of (repo, version, slug, etc)
• For --check-updates, cli will check skill-info.json version to get the version info, repo & calls that particular repo to get the latest version

Improvement in SKILLS UPDATE

• supports --agent, --project-dir/--global
• Supports --path <direct_path> , when --path is given no need to provide --agent, --project-dir/--global
• Loads meta-data from skill-info.json to get version, fall back to SKILL.md if skill-info.json is not present
• multi-agent update (--agent takes multiple agents seperated by comma (,))

Improvement in SKILLS Install

• During installation of skill, all its meta data will be stored in .jfrog/skill-info.json , this file will be used by list, update, to know REPO from which it is downloaded, VERSION (no need to write version number inside SKILL.md) & other info

RTECO-1011 is parent task of RTECO-1077 & RTECO-1078
Since changes of both RTECO-1078 & 1077 are present in this PR, used RTECO-1011 in PR title

• All tests passed. If this feature is not already covered by the tests, I added new tests.
• All static analysis checks passed.
• Appropriate label is added to auto generate release notes.
• I used gofmt for formatting the code before submitting the pull request.
• PR description is clear and concise, and it includes the proposed solution/fix.

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