v0.8.0-fork.2

Changed

• Spaces now group under the repository they belong to, so worktrees created outside Herdr and several spaces on one checkout share a single group.
• Grouped rows now show their checkout name alongside the branch and ahead/behind counts instead of replacing the name with the branch.

Fixed

• Fixed a panic on builds whose version carries a prerelease suffix, which killed the server whenever a plugin manifest was loaded.