…nters across extensions even if the `PYBIND11_INTERNALS_VERSION`s do not match.

…l changes)"

This reverts commit 3ccea8c.

…ckage/test_files.py

…bi_id`, `cpp_typeid_name`

…raveler_types.h

…function.

…id_name`).

```
/__w/pybind11/pybind11/tests/exo_planet_c_api.cpp:10:18: error: 'wrapGetLuggage' is a static definition in anonymous namespace; static is redundant here [readability-static-definition-in-anonymous-namespace,-warnings-as-errors]
   10 | static PyObject *wrapGetLuggage(PyObject *, PyObject *) { return PyUnicode_FromString("TODO"); }
      | ~~~~~~           ^
/__w/pybind11/pybind11/tests/exo_planet_c_api.cpp:14:20: error: 'ThisMethodDef' is a static definition in anonymous namespace; static is redundant here [readability-static-definition-in-anonymous-namespace,-warnings-as-errors]
   14 | static PyMethodDef ThisMethodDef[]
      | ~~~~~~             ^
/__w/pybind11/pybind11/tests/exo_planet_c_api.cpp:17:27: error: 'ThisModuleDef' is a static definition in anonymous namespace; static is redundant here [readability-static-definition-in-anonymous-namespace,-warnings-as-errors]
   17 | static struct PyModuleDef ThisModuleDef = {
      | ~~~~~~                    ^
```

…11/detail/type_caster_base.h, under the name `class_dunder_cpp_transporter()`

…objects, but do not include that magic method in docstring signatures.

…ility can be handled separately, later.

…ith `std::string(obj)`

… `str` to `bytes`.

This avoids the unicode decode/encode roundtrips:

* More robust (no decode/encode errors).

* Minor runtime optimization.

…(no functional changes).

…ype_info *"` -> `typeid(std::type_info).name()` (this IS a functional change).

This provides an extra layer of protection against C++ ABI mismatches:

* The first and most important layer is that the `PYBIND11_PLATFORM_ABI_ID`s must match between extensions.

* The second layer is that the `typeid(std::type_info).name()`s must match between extensions.