docs(aw): add "Creating Command Workflows" section to create-agentic-workflow.md

[Copilot]

The workflow creator agent lacked guidance on how to build on-demand "command" workflows, leaving it without a clear recommendation between the two supported approaches.

Changes

• New ## Creating Command Workflows section in .github/aw/create-agentic-workflow.md covering both triggers with tradeoffs, when-to-recommend guidance, permission requirements, and working examples:

  • slash_command — user types /command in a comment; flexible, composable, accepts context via comment body, less discoverable
  • label_command — user applies a label; auto-removed after activation, visible in GitHub UI sidebar, no argument passing

• Comparison table for at-a-glance decision making:

  	slash_command	label_command
  Invocation	/command as first word of a comment	Apply a label via GitHub UI
  Discoverability	Low	High — visible in label picker
  Arguments	Comment body provides context	No arguments; one-shot action
  Part of LabelOps	No	Yes

• Combining both — documents the slash_command + label_command OR-trigger pattern so workflows can be reached via either mechanism

• Cross-references updated — Issue Form Mode Step 2 trigger list gains an "On-demand commands" entry pointing to the new section; "Starting the conversation" clarifying question updated to mention label commands

Original prompt

Update the create-agent- workflows.md with a section on creating commands. Label_command and slash_command can be used with each their own tradeoff. Label is more precise and part of labelops. Slash_command is more flexible but less discoverable. These are the preferred ways to create "command" line workflows.

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[Copilot]

Pull request overview

Adds guidance for authoring on-demand “command” agentic workflows so workflow creators can choose the right trigger pattern and implement it correctly.

Changes:

• Added a new “Creating Command Workflows” section documenting slash_command vs label_command, including tradeoffs, recommendations, and examples.
• Added a comparison table and documented an OR-trigger pattern combining both triggers.
• Updated existing guidance to reference label commands in the interactive prompt and Issue Form Mode trigger selection.

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