[BUG] Some aliases are unavailable in Python mode (p_uchar)

[vytas7]

Describe the bug

I'm trying to write some code using the so-called pure Python mode, but apparently there is no full parity between types and constants in the compiled and pure Python modes.

Code to reproduce the behaviour:

import cython

ptr: cython.p_uchar

$ python test.py 
<...>
AttributeError: module 'cython' has no attribute 'p_uchar'. Did you mean: 'p_char'?

However cythonize works just fine:

$ cythonize -i test.py 
Compiling /tmp/test.py because it changed.
(Some warnings about 'language_level' not set, compiles fine otherwise.)

Expected behaviour

If Cython pure-Python mode code compiles, I expect it to be importable even when not compiled.

OS

Linux

Python version

CPython 3.10.12

Cython version

3.0.7

Additional context

No response

[scoder]

Duplicate of #4227

[scoder]

Sorry, my fault. I checked and the unsigned and signed pointer types are really missing. I'll add them.
Thanks for the report.