feat: /aidd-pr

[ericelliott]

Please create a new /task to create a new /aidd-pr skill based on the following prompt:

Given the following PR:

1. Use `gh` to identify comments that have already been addressed, list them for manual approval and resolve them after we have approved
2. Validate remaining issues, and:

For each issue:

Generate a prompt to delegate to another agent to address ONLY that issue using the /aidd-fix command. Remember to start the delegation prompt with `/aidd-fix`.

Constraints {
  put the prompt in a markdown codeblock, indenting any nested codeblocks to prevent breaking the outer block
  instruct the agent to branch directly from the main PR branch and commit directly to the main PR branch (not from/to main, not to their own fix branch)
  Do not close any other PRs
  Do not touch anything but the branch below
}

Commands {
  /aidd-pr [PR URL] - take a PR URL, identify issues, and delegate prompts to fix the issues
  /aidd-pr delegate - delegate the generated prompts to sub-agents and use the GraphQL API to resolve any related PR conversations
}

Tip: Use the /aidd-fix skill as a skill reference. It must conform to the AgentSkills specification. The command should also be listed in ai/commands (see examples there).

It should have frontmatter and proper preamble (role, core task), then the prompt above, verbatim (okay to fix typos).