Feature implementation from commits 7f8f40c..9f8af01

[yashuatla]

PR Summary

Update Type Annotations to Python 3.10+ Syntax

Overview

This PR modernizes type annotations throughout the codebase, migrating from the typing module syntax to Python 3.10+ native syntax (using the pipe operator | for unions and lowercase collection types).

Change Types

Type	Description
Refactor	Update type annotations from typing.Optional[T] to T | None
Refactor	Change collection types from List[T], Set[T], etc. to list[T], set[T], etc.
Refactor	Move imports from typing to collections.abc
Enhancement	Add doctest examples to EntryPoint class documentation
Feature	Add new internal class _EntryPointMatch

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Affected Modules

Module / File	Change Description
__init__.py	Update type annotations, add _EntryPointMatch class, add doctests
_collections.py	Change Pair from collections.namedtuple to typing.NamedTuple
_meta.py	Update imports and type annotations

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Notes for Reviewers

• These changes maintain functional equivalence while adopting more modern Python type annotation syntax
• The new _EntryPointMatch class inherits from types.SimpleNamespace