refactor(generator): consolidate typing imports from typing_extensions

[yie1d]

• Move NotRequired and TypedDict imports from typing_extensions to typing module in command_generator.py
• Move NotRequired and TypedDict imports from typing_extensions to typing module in event_generator.py
• Move NotRequired and TypedDict imports from typing_extensions to typing module in type_generator.py
• Move Literal import from typing_extensions to typing module in type_generator.py
• Consolidate multiple import statements into single import line for better readability
• Reduces dependency on typing_extensions by using Python 3.10+ standard library types

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Summary by cubic

Refactored generator imports to use Python 3.10+ typing (NotRequired, TypedDict, Literal) and merged duplicate import lines for cleaner files. This removes the typing_extensions dependency and keeps imports consistent across command, event, and type generators.

• Refactors
  • Switched NotRequired, TypedDict, and Literal to typing.
  • Consolidated imports into a single line in each generator.
  • Removed typing_extensions usage in generator modules.

^{Written for commit 3bd870b. Summary will update on new commits.}

[yie1d]

solve #16

[cubic-dev-ai]

No issues found across 3 files