Automations should be able to use /orchestrate to access multiple repos

### Feature summary

Allow multiple repos for automation

### What problem are you trying to solve?

I have to choose a single repo when creating an automation. I can give it my own orchestration routine as part of the prompt but it would be better to just be able to select multiple repos for orchestration in the UI.

### Proposed solution

I would like to see the ability to select multiple repos for an automation like you can for a chat and have it run the /orchestrate skill to access all the repos and make changes as necessary.

### Workflow impact

Anyone who is in a multi repo environment (majority I suspect) and is trying to use the automations feature.

### Installation context

_No response_

### Additional context

_No response_

まず、自動化作成 UI と既存の /orchestrate ワークフローを追跡します。複数のリポジトリをどのように選択するか、また自動化がそれらすべてにアクセスできるようにする方法を定義し、その後、完全なマルチリポジトリ自動化フローが説明どおりに機能することを確認します。

索引モデルが issue の本文から書いたものです。