docs(skills): document skill packaging and distribution

[mattKorwel]

This PR adds documentation for packaging agent skills into .skill files for easier distribution and clarifies the installation and activation steps.

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the documentation for managing agent skills within the Gemini CLI. It introduces comprehensive guides on how to package skills into distributable .skill files, covering both automated and manual methods, and clarifies the process for installing and activating these skills within a Gemini session.

Highlights

• Skill Packaging Documentation: New sections were added to docs/cli/creating-skills.md detailing how to package agent skills into .skill files for distribution.
• skill-creator Toolchain: Instructions were provided for using the built-in skill-creator skill to validate and package skills.
• Manual Packaging: Guidance was included for manually creating .skill files using ZIP archives.
• Skill Installation: Documentation was added for installing packaged .skill files using the gemini skills install command for both user and workspace scopes.
• Skill Activation and Reloading: A new section in docs/cli/skills.md clarifies how to activate newly installed or linked skills in active sessions and how new sessions handle discovery.

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[gemini-code-assist]

Code Review

This pull request updates the Gemini CLI documentation for skills. It adds new sections to docs/cli/creating-skills.md detailing how to package and install skills, including both manual methods and using the skill-creator toolchain. Additionally, docs/cli/skills.md now includes a section on skill activation and reloading. Review feedback indicates that the documentation for the name property, a required field in SKILL.md frontmatter, was inadvertently removed and needs to be restored. Also, the example zip command provided for manual packaging is incorrect and would cause skill installation to fail, requiring a correction.

_{Note: Security Review has been skipped due to the limited scope of the PR.}

[github-actions]

Size Change: -4 B (0%)

Total Size: 26.3 MB

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