Convert Copilot Prompts to Agents

[garrytrinder]

Copilot Prompts repo accepts agent instructions as contributions, we should look into converting these in to samples in this repo.

[lovyjain]

I am taking an automated-first approach by building a GitHub Skill to convert one Copilot prompt agent instruction at a time into a DA declarative skill.
For now, the process is still manual per prompt, but the output will be directly usable in GitHub Copilot.
Please let me know what you think and do have some other options in review