The `wgpu` example doesn't run on asahi

**Problem**

```
cargo run --example wgpu --features="desktop gpu"
```
Fails on line 55
https://github.com/DioxusLabs/dioxus/blob/main/examples/wgpu.rs#L55 with
```
thread 'main' panicked at examples/wgpu.rs:55:26:
called `Option::unwrap()` on a `None` value
```

will fail.

**Steps To Reproduce**

```
cargo run --example wgpu --features="desktop gpu"
```

**Expected behavior**

The example runs, or indicates more clearly why it doesn't (unsupported platform or device).
I'm not sure if this is supposed to happen (is linux support there on wayland ?)

**Environment:**
- Dioxus version: master, 04282ef8897902fc88f99204174eb2ff03a88921
- Rust version: rustc 1.83.0 (90b35a623 2024-11-26)
- OS info: Fedora 41 asahi remix
- App platform: desktop
- device info : Mac mini M2

**Questionnaire**

I'm interested in fixing this myself but don't know where to start (at the very least I'll be ready to try to debug)