Expand uv_build supported versions in build-system

[manzt]

Also migrates/removes deprecated metadata in pyproject.toml

Previously, with uv>=0.11:

❯ uv sync
Resolved 381 packages in 3ms
   Building marimo @ file:///Users/tmanz/github/marimo-team/marimo
⠙ Preparing packages... (0/1)                       
                                                                                            
warning: `build_system.requires = ["uv-build>=0.8.3,<0.11.0"]` does not contain the current uv version 0.11.7
warning: Found license classifier `License :: OSI Approved :: Apache Software License`. License classifiers are ambiguous and deprecated per PEP     

Built marimo @ file:///Users/tmanz/github/marimo-team/marimo
Prepared 1 package in 6ms
Uninstalled 1 package in 0.89ms
Installed 1 package in 4ms
 ~ marimo==0.23.1 (from file:///Users/tmanz/github/marimo-team/marimo)

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview, Comment	Apr 16, 2026 6:24pm

[manzt]

https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license

[Copilot]

Pull request overview

Updates Python packaging metadata to eliminate uv build warnings and modernize license metadata in pyproject.toml.

Changes:

• Expand uv_build version range in [build-system].requires to support uv 0.11.x.
• Replace license = { file = "LICENSE" } with an SPDX license expression.
• Remove the deprecated/ambiguous license classifier.

[manzt]

https://packaging.python.org/en/latest/specifications/pyproject-toml/#classifiers

The use of License :: classifiers is deprecated and tools MAY issue a warning informing users about that. Build tools MAY raise an error if both the license string value (translating to License-Expression metadata field) and the License :: classifiers are used.