Migrate to uv

[jiaxinnns]

Fixes #24

[Copilot]

Pull request overview

This PR migrates the repository’s Python dependency management to uv by introducing a committed uv.lock, moving dev/test dependencies into pyproject.toml dependency groups, removing the legacy requirements.txt, and enabling Dependabot updates.

Changes:

• Add uv.lock and remove requirements.txt to complete the switch from requirements-based installs to uv lockfiles.
• Define dev and test dependency groups in pyproject.toml for uv-based workflows.
• Add Dependabot configuration to track updates for uv and GitHub Actions.

Reviewed changes

Copilot reviewed 2 out of 4 changed files in this pull request and generated no comments.

File	Description
uv.lock	Introduces the locked dependency graph for the project under uv.
requirements.txt	Removed in favor of pyproject.toml + uv.lock.
pyproject.toml	Adds [dependency-groups] and adjusts pytest pythonpath settings for test execution.
.github/dependabot.yml	Enables automated dependency updates (uv + GitHub Actions).

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[jovnc]

LGTM