feat: Upgrade guppylang, tket, & hugr for guppylang v1

[cgh-qtnm]

Upgraded the upper-stack dependencies to guppylang v1 and compatible, and increased requires-python to 3.12. The only code change is the removal of register_extension.

[Copilot]

Pull request overview

Upgrades the project’s dependency stack to target guppylang v1-compatible releases (including tket-exts and hugr) and aligns the project with Python 3.12+. The only runtime code change removes the ENGINE.register_extension(...) call that was previously executed during decoration.

Changes:

• Bump Python requirement to >=3.12 and update dependency constraints to guppylang/guppylang-internals ~=1.0.0rc1, hugr ~=0.18.0, and tket-exts ~=0.14.0.
• Allow pre-releases in uv configuration and lockfile to enable resolving RC/alpha packages.
• Remove extension registration call from ext_module_decorator-produced decorator.

Reviewed changes

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

File	Description
uv.lock	Regenerates lock for Python 3.12+ and updated upper-stack packages; enables prerelease resolution.
pyproject.toml	Updates Python/version constraints and adds uv prerelease configuration.
src/guppy_gpu/decorator.py	Removes ENGINE.register_extension(QSYSTEM_GPU_EXTENSION) from the decorator path.

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