refactor: tagInput and tagList vanilla extract (#5614)

* refactor: tag input and tag list vanilla extract

* fix: add tests and improve accessibility

Author: lisalupi

.changeset/lazy-lights-invent.md

@@ -0,0 +1,6 @@
+---
+"@ultraviolet/ui": minor
+---
+
+- Refactor components `TagInput` and `TagList` to use vanilla-extract instead of emotion
+- `TagList` : popover should be openable using keyboard keys (space or enter)