Would it be possible to add multiple folders/repositories for a project?

Would it be possible to add multiple folders/repositories for a project? Right now, one project = one folder/one repository.

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| Field | Value |
| --- | --- |
| App version | 1.1.6 |
| OS | macOS 26.6.1 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Day 5 (Week 1) |

No files or tests are named. Start by locating how projects store their folder or repository association and where that association is selected in the desktop app. Done should mean a project can add, retain, and use multiple folders or repositories without breaking existing single-folder projects.

索引モデルが issue の本文から書いたものです。