Unite icons (#1374)

## Launch Checklist

This removes the `@mdi` (material design icons) package and uses the
icons from `react-icons`.
The icons are not exactly the same, but have the same idea behind them.

 - [x] Briefly describe the changes in this PR.
- [x] Include before/after visuals or gifs if this PR includes visual
changes.
 - [x] Add an entry to `CHANGELOG.md` under the `## main` section.

Main changes can be found below.
Before:
<img width="580" height="780" alt="image"
src="https://github.com/user-attachments/assets/e3d5fc8a-bd59-48fe-bdae-31bb290749c8"
/>


After:

<img width="580" height="780" alt="image"
src="https://github.com/user-attachments/assets/bacdbdba-9e73-4bef-bd30-26fe946269c1"
/>

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -3,6 +3,7 @@
 ### ✨ Features and improvements
 - Added translation to "Links" in debug modal
 - Add support for hillshade's color arrays and relief-color elevation expression
+- Remove `@mdi` packages in favor of `react-icons`
 - _...Add new stuff here..._
 
 ### 🐞 Bug fixes