Finish Deno 2.0 migration (v.0.3.0)

### ⭐ Suggestion

The Deno 2.0 rework of the UIX and DATEX code base is not totally finished yet. We are still using deprecated/soft-deleted features at some points in code.

* [ ] Remove soft deprecated features from code base

**Additional resources:**
* Migration guide https://docs.deno.com/runtime/reference/migration_guide/

### 📃 Motivating Example

*empty*

