enable free threading in watchdog_fsevents.c #1140
Description
I'd like to run the Werkzeug test suite on Python 3.14t. However, the fsevents extension is not marked for free threading, so it enables the GIL when imported. I'm not sure what will be involved in actually supporting free threading for the watchdog extension, but here's what we did in MarkupSafe to indicate support: https://github.com/pallets/markupsafe/blob/b2e4d9c7687be25695fffbe93a37622302b24fb1/src/markupsafe/_speedups.c#L178-L194
static PyModuleDef_Slot module_slots[] = {
#ifdef Py_mod_multiple_interpreters // Python 3.12+
{Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
#endif
#ifdef Py_mod_gil // Python 3.13+
{Py_mod_gil, Py_MOD_GIL_NOT_USED},
#endif
{0, NULL} /* Sentinel */
};
static struct PyModuleDef module_definition = {
.m_base = PyModuleDef_HEAD_INIT,
.m_name = "markupsafe._speedups",
.m_size = 0,
.m_methods = module_methods,
.m_slots = module_slots,
};