Support "frozendict" when the next alpha of 3.15 is out #668
Description
Is your feature request related to a problem? Please describe.
Python 3.15 introduces a new "frozendict" type. This requires some work to properly support in PyObjC
Describe the solution you'd like
- Proxy frozendict instances to OC_BuiltinPythonDictionary
- Accept frozendict instances everywhere where a dict is accepted but never updated
- Add tests for this