Similar to c12041b which added outdated agent detection, this commit adds:
- Version comparison process for detecting outdated local assets
- Fetch remote versions step in the process workflow
- Updated icons reference with outdated status indicators
- Update handling sections for managing outdated assets
- Updated output table examples to show outdated status
* Migrating chat modes to agents now that's been released to stable
* Fixing collections
* Fixing names of agents
* Formatting
* name too long
* Escaping C# agent name
* Adding a collection for the meta prompts to help discover items in the awesome copilot repo
* Forgot to run validation locally
* YAML schema validation set and updating readme
