chore: add type stubs

[alesanfra]

This should fix #2

[Copilot]

Pull request overview

This PR adds PEP 561-compliant type stubs to enable type checking for the toons Python extension module, fixing issue #2 where type checkers like ty could not resolve module attributes. The changes include creating a .pyi stub file, configuring maturin to include it in distributions, bumping the package version, and updating the ruff pre-commit hook.

Changes:

• Added toons.pyi type stub file with complete function signatures for load, loads, dump, and dumps
• Configured maturin to include the type stub in package distributions
• Bumped version from 0.5.0 to 0.5.1

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
toons.pyi	New type stub file providing type hints for all public API functions with correct signatures matching the Rust implementation
pyproject.toml	Added include = ["toons.pyi"] to maturin configuration to ensure type stubs are distributed with the package
Cargo.toml	Version bumped from 0.5.0 to 0.5.1
Cargo.lock	Lock file updated to reflect version 0.5.1
.pre-commit-config.yaml	Updated ruff pre-commit hook from v0.14.10 to v0.15.0

---

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