A DESCRIPTION OF THE PROBLEM :
As long as any of the `--include-xxx` filters are specified, there is no way to generate enum constants.

Minimum reproducible code:

```c
#pragma once

enum E {
    ENUM_VAL_1, ENUM_VAL_2
};
typedef enum E E;

inline void test_foo(void) {}
```

run `./jextract --output test_out --source ./test.h --include-function test_foo --include-typedef E`