[Bugs] The GitHub Copilot app doesn't properly read git worktrees.

**Mood:** 😔
**Category:** Bugs

The GitHub Copilot app doesn't properly read git worktrees.

My folder structure works as such:
`X:/Projects/{project}` is the repo root.

Then worktrees are under the `X:/Projects/{project}/.worktrees/{worktree}` subfolders.

When I point the GHCP app to the repo root, it doesn't automatically pick up my worktrees and sessions in those worktrees.

---
| Field | Value |
| --- | --- |
| App version | 1.0.1 |
| OS | Windows 10.0.26637 |
| Theme | GitHub |
| Path | / |
| Tenure | Day 4 (Week 1) |

Start by reproducing the issue in the GitHub Copilot app on Windows with a repository containing worktrees under .worktrees, then trace how the app discovers repositories and sessions from the selected root. Done means worktrees and their sessions are detected when the repository root is opened, with coverage for the reported folder layout if the project has a suitable test location.

Written by the indexing model from the issue text.