Adds "Juan De Fuca Strait" map - 3 way team map (#4215)

Resolves #4148

## Description:

Adds "Juan de Fuca Strait" map. This is the Strait in Washington and
British Columbia: https://en.wikipedia.org/wiki/Strait_of_Juan_de_Fuca

This map is meant to be a brand new 3-team way map, since all the team
maps we have are either made for 2 or 4 teams.
The map is bumped towards this gamemode similar to how Baikal is bumped
to 2 teams.

Map also has Additional Nations, for a total fof 62, for Human vs
Nations and solo games
<img width="1365" height="602" alt="image"
src="https://github.com/user-attachments/assets/9cb86727-db06-4fcb-bee4-85e7b5d47d15"
/>
<img width="1319" height="488" alt="image"
src="https://github.com/user-attachments/assets/13fd9a01-7ec6-49ab-81c3-40b566cbf6e0"
/>
data from OpenTopography, already credited

## 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:

tri.star1011

src/server/MapPlaylist.ts

@@ -74,6 +74,7 @@ const FREQUENCY: Partial<Record<GameMapName, number>> = {
   IndianSubcontinent: 8,
   Italia: 6,
   Japan: 6,
+  JuanDeFucaStrait: 4,
   Korea: 5,
   Labyrinth: 6,
   Lemnos: 3,
@@ -151,6 +152,7 @@ const SPECIAL_TEAM_MAPS: ReadonlyMap<GameMapType, TeamCountConfig> = new Map([
   [GameMapType.Surrounded, 4],
   [GameMapType.GulfOfStLawrence, 3],
   [GameMapType.ChoppingBlock, 4],
+  [GameMapType.JuanDeFucaStrait, 3],
 ]);
 
 type ModifierKey =