Add Agentic Workflows as a new resource type

Add support for contributing Agentic Workflows — AI-powered repository
automations that run coding agents in GitHub Actions, defined in markdown
with natural language instructions (https://github.github.com/gh-aw).

Changes:
- Create workflows/ directory for community-contributed workflows
- Add workflow metadata parsing (yaml-parser.mjs)
- Add workflow README generation (update-readme.mjs, constants.mjs)
- Add workflow data to website generation (generate-website-data.mjs)
- Update README.md, CONTRIBUTING.md, and AGENTS.md with workflow docs,
  contributing guidelines, and code review checklists

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

AGENTS.md

@@ -9,6 +9,7 @@ The Awesome GitHub Copilot repository is a community-driven collection of custom
 - **Instructions** - Coding standards and best practices applied to specific file patterns
 - **Skills** - Self-contained folders with instructions and bundled resources for specialized tasks
 - **Hooks** - Automated workflows triggered by specific events during development
+- **Workflows** - [Agentic Workflows](https://github.github.com/gh-aw) for AI-powered repository automation in GitHub Actions
 - **Plugins** - Installable packages that group related agents, commands, and skills around specific themes
 
 ## Repository Structure
@@ -20,6 +21,7 @@ The Awesome GitHub Copilot repository is a community-driven collection of custom
 ├── instructions/     # Coding standards and guidelines (.instructions.md files)
 ├── skills/           # Agent Skills folders (each with SKILL.md and optional bundled assets)
 ├── hooks/            # Automated workflow hooks (folders with README.md + hooks.json)
+├── workflows/        # Agentic Workflows (folders with README.md + workflow .md files)
 ├── plugins/          # Installable plugin packages (folders with plugin.json)
 ├── docs/             # Documentation for different resource types
 ├── eng/              # Build and automation scripts
@@ -96,6 +98,17 @@ All agent files (`*.agent.md`), prompt files (`*.prompt.md`), and instruction fi
 - Follow the [GitHub Copilot hooks specification](https://docs.github.com/en/copilot/how-tos/use-copilot-agents/coding-agent/use-hooks)
 - Optionally includes `tags` field for categorization
 
+#### Workflow Folders (workflows/*/README.md)
+- Each workflow is a folder containing a `README.md` file with frontmatter and one or more `.md` workflow files
+- README.md must have `name` field (human-readable name)
+- README.md must have `description` field (wrapped in single quotes, not empty)
+- README.md should have `triggers` field (array of trigger types, e.g., `['schedule', 'issues']`)
+- Workflow `.md` files contain YAML frontmatter (`on`, `permissions`, `safe-outputs`) and natural language instructions
+- Folder names should be lower case with words separated by hyphens
+- Can include bundled assets (scripts, configuration files)
+- Optionally includes `tags` field for categorization
+- Follow the [GitHub Agentic Workflows specification](https://github.github.com/gh-aw)
+
 #### Plugin Folders (plugins/*)
 - Each plugin is a folder containing a `.github/plugin/plugin.json` file with metadata
 - plugin.json must have `name` field (matching the folder name)
@@ -107,7 +120,7 @@ All agent files (`*.agent.md`), prompt files (`*.prompt.md`), and instruction fi
 
 ### Adding New Resources
 
-When adding a new agent, prompt, instruction, skill, hook, or plugin:
+When adding a new agent, prompt, instruction, skill, hook, workflow, or plugin:
 
 **For Agents, Prompts, and Instructions:**
 1. Create the file with proper front matter
@@ -125,6 +138,15 @@ When adding a new agent, prompt, instruction, skill, hook, or plugin:
 7. Verify the hook appears in the generated README
 
 
+**For Workflows:**
+1. Create a new folder in `workflows/` with a descriptive name
+2. Create `README.md` with proper frontmatter (name, description, triggers, tags)
+3. Add one or more `.md` workflow files with `on`, `permissions`, and `safe-outputs` frontmatter
+4. Add any bundled scripts or assets to the folder
+5. Update the README.md by running: `npm run build`
+6. Verify the workflow appears in the generated README
+
+
 **For Skills:**
 1. Run `npm run skill:create` to scaffold a new skill folder
 2. Edit the generated SKILL.md file with your instructions
@@ -241,6 +263,17 @@ For hook folders (hooks/*/):
 - [ ] Follows [GitHub Copilot hooks specification](https://docs.github.com/en/copilot/how-tos/use-copilot-agents/coding-agent/use-hooks)
 - [ ] Optionally includes `tags` array field for categorization
 
+For workflow folders (workflows/*/):
+- [ ] Folder contains a README.md file with markdown front matter
+- [ ] Has `name` field with human-readable name
+- [ ] Has non-empty `description` field wrapped in single quotes
+- [ ] Has `triggers` array field listing workflow trigger types
+- [ ] Folder name is lower case with hyphens
+- [ ] Contains at least one `.md` workflow file with `on` and `permissions` in frontmatter
+- [ ] Workflow uses least-privilege permissions and safe outputs
+- [ ] Follows [GitHub Agentic Workflows specification](https://github.github.com/gh-aw)
+- [ ] Optionally includes `tags` array field for categorization
+
 For plugins (plugins/*/):
 - [ ] Directory contains a `.github/plugin/plugin.json` file
 - [ ] Directory contains a `README.md` file