How to use ImportC to import WebGPU header

[ryuukk_]

You need to use a .c file that include it


--- webgpu.c

```c
#include "webgpu.h"

```


--- app.d

```d
import std.stdio;
import webgpu;

void main()
{
     writeln(WGPUBlendFactor_Dst);
}
```


result:

```
$ dmd -run app.d webgpu.c
WGPUBlendFactor_Dst
```