Adds Scandinavia map (#4561)

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**Add approved & assigned issue number here:**

Resolves #4543 

## Description:

Adds Map of Scandinavia. This is highly requested and I'm surprised this
map doesnt exist already. The layout is based on the Territorial
version.
Land area: 2.47M pixels
Nations: 24, with additional nations totaling to 62.

<img width="2006" height="2243" alt="image"
src="https://github.com/user-attachments/assets/a959acd3-7871-4d94-8722-b0b69defa9db"
/>
<img width="551" height="590" alt="Screenshot 2026-07-08 162324"
src="https://github.com/user-attachments/assets/e4a49073-04dc-416d-841a-ab945a40d260"
/>


## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory

## Please put your Discord username so you can be contacted if a bug or
regression is found:

DISCORD_USERNAME crunchybbbbb

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

src/core/game/Maps.gen.ts

@@ -81,6 +81,7 @@ export enum GameMapType {
   Pluto = "Pluto", // map-generator/assets/maps/pluto/info.json
   Russia = "Russia", // map-generator/assets/maps/russia/info.json
   SanFrancisco = "San Francisco", // map-generator/assets/maps/sanfrancisco/info.json
+  Scandinavia = "Scandinavia", // map-generator/assets/maps/scandinavia/info.json
   Sierpinski = "Sierpinski", // map-generator/assets/maps/sierpinski/info.json
   SouthAmerica = "South America", // map-generator/assets/maps/southamerica/info.json
   SoutheastAsia = "SoutheastAsia", // map-generator/assets/maps/southeastasia/info.json
@@ -731,6 +732,13 @@ export const maps: readonly MapInfo[] = [
     categories: ["north_america"],
     multiplayerFrequency: 3,
   },
+  {
+    id: "Scandinavia",
+    type: GameMapType.Scandinavia,
+    translationKey: "map.scandinavia",
+    categories: ["europe", "new"],
+    multiplayerFrequency: 7,
+  },
   {
     id: "Sierpinski",
     type: GameMapType.Sierpinski,