Add tileSize field for raster and raster-dem tile sources (#946) (#947)

## Launch Checklist

Add `tileSize` field for raster and raster-dem tile sources. Solves #946


![Untitled](https://github.com/user-attachments/assets/833bf41b-0439-47f3-b9ff-5f289f437725)

### Not in this PR

i18n for `Tile Size`

 - [x] Briefly describe the changes in this PR.
 - [x] Link to related issues.
- [x] Include before/after visuals or gifs if this PR includes visual
changes.
 - [x] Write tests for all new functionality.
 - [x] Add an entry to `CHANGELOG.md` under the `## main` section.

---------

Co-authored-by: Harel M <harel.mazor@gmail.com>
Co-authored-by: Keitaroh Kobayashi <keita@kbys.me>
Co-authored-by: Hugues Tavernier <hugues.tavernier@protonmail.com>
Co-authored-by: Joscha <34318751+josxha@users.noreply.github.com>

CHANGELOG.md

@@ -4,6 +4,7 @@
 - Add german translation
 - Use same version number for web and desktop versions
 - Add scheme type options for vector/raster tile
+- Add `tileSize` field for raster and raster-dem tile sources
 - _...Add new stuff here..._
 
 ### 🐞 Bug fixes