Panda3d-interrogate

* Removes Panda3D-specific initialization code
* Add `-init` flag to interrogate_module to call custom init function (3)
* Fix a compile error with Python 3.13 free-threaded build
* Fixes some compile issues with recent compilers
* Remap function indices in wrappers (7)
* Use dynamically allocated type objects for py_wrappers as a step towards multi-interpreter / interpreter restarting support

This release adds free-threaded Python wheels for interrogate itself, and also adds .pyi stub files.

This release contains further work on Python 3.13 free-threading support.

This release fixes two problems:

* The Python extension for interrogatedb was erroneously installed as `interrogatedb.interrogatedb` instead of just `interrogate`
* Code did not compile correctly with Python 3.13.