Add Type Imports for Python

[mauriciogardini]

This PR adds support for Python's type-only imports.

• Automatic type-only detection: When a symbol is only used in type annotation contexts (e.g., function parameters, return types), it's automatically placed inside if TYPE_CHECKING:
• Smart import upgrading: If a symbol is initially used only for types but later used as a value, the import is automatically upgraded to a regular import
• TypeRefContext component: Explicitly mark references as type-only when needed

[github-actions]

All changed packages have been documented.

• ✅ @alloy-js/python

Show changes

@alloy-js/python - feature ✏️

Add type-only imports support in Python code generation.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/alloy-framework/alloy/@alloy-js/python@367

commit: d573f54