chore: bump version to 3.0.1.dev0

[dwilding]

No description provided.

[Copilot]

Pull request overview

Bumps the gimmegit project version to 3.0.1.dev0 to start the next development iteration, keeping the package metadata, runtime version, and lockfile in sync.

Changes:

• Update pyproject.toml project version to 3.0.1.dev0.
• Update runtime __version__ in src/gimmegit/_version.py.
• Update the gimmegit entry in uv.lock to match the new version.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
pyproject.toml	Updates the project/package version metadata to 3.0.1.dev0.
src/gimmegit/_version.py	Updates the runtime-reported version constant to 3.0.1.dev0.
uv.lock	Aligns the locked editable package version for gimmegit with 3.0.1.dev0.