Clean up all skill bucket READMEs — sort entries alphabetically within
user/model sections, add category descriptions to each bucket, simplify
the deprecated forge-skills doc to a bare notice, update triage label
count (5→7) in AGENTS.md, and add a Project Context Pack section.
Break the monolithic forge-interaction skill into focused, single-responsibility
skills for better predictability and maintainability:
- Add forge-github skill for GitHub-specific interactions using `gh` CLI
- Add forge-gitea skill for Gitea-specific interactions using `tea` CLI
- Convert forge-interaction into a router that delegates to specialized skills
- Add forge-router skill with model invocation disabled for guidance only
- Move all forge-related skills to common/deprecated directory
Each specialized skill now contains its own complete decision tree, CLI usage
patterns, and authentication checks for its respective forge platform.
gitadmin