[FocusTrap] Convert focus trap to typescript

[trizotti]

closes #34722

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[mui-bot]

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[michaldudak]

Thanks for working on this. Could you please also convert the test file to TS?

As for the test_static failing, changing the JSDoc of isEnabled in FocusTrap.types.ts to:

@default function defaultIsEnabled(): boolean {
  return true;
}

should help.

[trizotti]

@michaldudak , I just finished with the test file and all the checks are passing now.

[trizotti]

No problem, @michaldudak ... Thanks for the review. I added the suggested changes.