Add structured autonomy prompts for generating, implementing, and planning implementation documentation

- Introduced `structured-autonomy-generate.prompt.md` for generating implementation plans from PRs.
- Added `structured-autonomy-implement.prompt.md` to execute implementation plans step-by-step.
- Created `structured-autonomy-plan.prompt.md` for collaborative project planning and outlining development steps.
- Implemented prompts for suggesting relevant GitHub Copilot agents, chat modes, collections, instructions, and prompts from the awesome-copilot repository.
- Developed `update-implementation-plan.prompt.md` for updating existing implementation plans with new requirements and structured output.

.github/prompts/create-github-issues-feature-from-implementation-plan.prompt.md

@@ -0,0 +1,28 @@
+---
+agent: 'agent'
+description: 'Create GitHub Issues from implementation plan phases using feature_request.yml or chore_request.yml templates.'
+tools: ['search/codebase', 'search', 'github', 'create_issue', 'search_issues', 'update_issue']
+---
+# Create GitHub Issue from Implementation Plan
+
+Create GitHub Issues for the implementation plan at `${file}`.
+
+## Process
+
+1. Analyze plan file to identify phases
+2. Check existing issues using `search_issues`
+3. Create new issue per phase using `create_issue` or update existing with `update_issue`
+4. Use `feature_request.yml` or `chore_request.yml` templates (fallback to default)
+
+## Requirements
+
+- One issue per implementation phase
+- Clear, structured titles and descriptions
+- Include only changes required by the plan
+- Verify against existing issues before creation
+
+## Issue Content
+
+- Title: Phase name from implementation plan
+- Description: Phase details, requirements, and context
+- Labels: Appropriate for issue type (feature/chore)