feat: Implement NewTypedDict[*Ps: Member] type operator

[AliiiBenn]

Summary

Implements the NewTypedDict[*Ps: Member] type operator as specified in PEP 827 for creating TypedDict types dynamically from Member type arguments.

Changes

• New class (typing.py): Added NewTypedDict class definition with docstring and usage examples
• Evaluator (_eval_operators.py): Implemented _eval_NewTypedDict function that:
  • Extracts member information (name, type, qualifiers) from Member types
  • Handles NotRequired qualifier for optional fields
  • Creates a TypedDict with the appropriate annotations
  • Supports dynamic naming from the type alias context
• Tests (test_type_eval.py): Added 7 comprehensive test cases

Usage Examples

from typemap_extensions import NewTypedDict, Member
from typing import Literal
from typemap import eval_typing

# Create a TypedDict with multiple fields
result = eval_typing(
    NewTypedDict[
        Member[Literal[\"name\"], str],
        Member[Literal[\"age\"], int],
    ]
)
# result is a TypedDict with name: str, age: int

# With optional field (NotRequired)
result = eval_typing(
    NewTypedDict[
        Member[Literal[\"required_field\"], str],
        Member[Literal[\"optional_field\"], int, Literal[\"NotRequired\"]],
    ]
)

Test Cases

1. test_newtypeddict_basic - Basic TypedDict creation
2. test_newtypeddict_single_field - Single field creation
3. test_newtypeddict_preserves_types - Type preservation
4. test_newtypeddict_with_complex_types - Complex types (list, dict)
5. test_newtypeddict_multiple_fields - Multiple fields
6. test_newtypeddict_optional_field - NotRequired qualifier handling
7. test_newtypeddict_with_iter_attrs - Integration with Iter/Attrs

Related Issue

Closes #18

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