Philipp Spiess 6164783124
Emit --tw-drop-shadow property (#16471)
Fixes #16461

Ensure we also emit `@property --tw-drop-shadow`.

## Test plan

```
<div class="drop-shadow-2xl size-72 bg-white">
  <div class="size-48 saturate-100 bg-white"></div>
</div>
```

now only drops one shadow (screenshot from Vite playground):

<img width="562" alt="Screenshot 2025-02-12 at 16 37 25"
src="https://github.com/user-attachments/assets/94eaaf54-6fd5-4d10-9297-9e7523a02602"
/>
2025-02-12 18:36:03 +01:00
..
2025-02-10 14:09:00 +01:00
2024-12-11 15:27:20 +01:00