docs: move agent prompt to prompts/ and reframe as agent-directed instructions (#42)

* Initial plan

* docs: add ado-aw agent creation prompt

Co-authored-by: jamesadevine <4742697+jamesadevine@users.noreply.github.com>

* docs: move agent prompt to prompts/ and remove front matter

Co-authored-by: jamesadevine <4742697+jamesadevine@users.noreply.github.com>

* docs: reframe prompt as agent-directed instructions and add README reference

Co-authored-by: jamesadevine <4742697+jamesadevine@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: jamesadevine <4742697+jamesadevine@users.noreply.github.com>

Author: Copilot

README.md

@@ -6,6 +6,8 @@ pipelines that run AI agents in network-isolated sandboxes.
 
 Inspired by [GitHub Agentic Workflows (gh-aw)](https://github.com/githubnext/gh-aw).
 
+> **If you are an AI agent** tasked with creating an ado-aw workflow, read [`prompts/create-ado-agentic-workflow.md`](prompts/create-ado-agentic-workflow.md) for step-by-step instructions on authoring a workflow file.
+
 ---
 
 ## How It Works