Use protomaps for the tiles layer (#1663)

* feat(tiles): add protomaps base layer

- free non-commercial API usage
- support for high-DPI / retina displays out of the box
- opt-in via a button in the bottom left
- track usage (#1682)
- custom styles (#1670)

Co-authored-by: Rupert Redington <rupert@pirateutopia.org>
Co-authored-by: Rupert Redington <rupert@lola.tech>

package.json

@@ -166,6 +166,7 @@
     "postcss-loader": "^7.3.3",
     "prettier": "^3.2.5",
     "prisma": "^4.13.0",
+    "protomaps-leaflet": "3.1.2",
     "require-from-string": "^2.0.2",
     "start-server-and-test": "^2.0.3",
     "storybook": "7.6.17",