Add San Francisco map (#3373)

## Description:

Adds San Francisco bay map. 21 nations based on cities and towns of the
area. 1.8M land pixels , size of 2000x1700
Elevation data from Opentopography, already credited. 
Map frequency of 3, as to mirror New York map.

<img width="2000" height="1700" alt="image"
src="https://github.com/user-attachments/assets/dc80a2db-6233-4b50-8f07-bd21c23c8b53"
/>

## 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
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

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

tri.star1011

src/core/game/Game.ts

@@ -137,6 +137,7 @@ export enum GameMapType {
   Alps = "Alps",
   NileDelta = "Nile Delta",
   Arctic = "Arctic",
+  SanFrancisco = "San Francisco",
 }
 
 export type GameMapName = keyof typeof GameMapType;
@@ -186,6 +187,7 @@ export const mapCategories: Record<string, GameMapType[]> = {
     GameMapType.Alps,
     GameMapType.NileDelta,
     GameMapType.Arctic,
+    GameMapType.SanFrancisco,
   ],
   fantasy: [
     GameMapType.Pangaea,

src/server/MapPlaylist.ts

@@ -80,6 +80,7 @@ const frequency: Partial<Record<GameMapName, number>> = {
   Alps: 4,
   NileDelta: 4,
   Arctic: 6,
+  SanFrancisco: 3,
 };
 
 const TEAM_WEIGHTS: { config: TeamCountConfig; weight: number }[] = [