ci(framework): Add uv support

[danieljanes]

Merge after #6651

[Copilot]

Pull request overview

Adds initial uv support for the framework/ Python project by documenting common uv workflows, wiring uv configuration into framework/pyproject.toml, and adjusting dev scripts to behave under uv run.

Changes:

• Add framework/uv.md usage docs (sync/format/test/build) and a uv build helper script.
• Configure uv defaults and local devtool source in framework/pyproject.toml, and set Coverage’s data file location.
• Update framework/dev/test.sh to disable Ray’s uv run runtime-env hook during pytest.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
framework/uv.md	Documents how to use uv with the framework project (sync/run/build).
framework/pyproject.toml	Adds [tool.uv] config, local source mapping for devtool, and coverage data file location.
framework/dev/test.sh	Sets an env var to avoid Ray stalling under uv run during pytest.
framework/dev/build-uv.sh	Adds a small helper to build the framework using uv build.
dev/bootstrap-uv.sh	Adds a uv bootstrap script under repo-root dev/ (currently references non-existent paths from that location).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[chongshenng]

LGTM!