Add Titan map with random spawn nations - along new Cosmic map category (#4183)

Resolves #4182

## Description:

Adds "Titan" (real moon of Saturn with methane seas) map . Uses new
random spawn nation feature by FloPinguin.
https://github.com/openfrontio/OpenFrontIO/pull/4156

Also adds new Cosmic map category. The "Other" map category has become a
wastebasket of unrelated maps, and with increasing number of maps, i
think its a good addition to have better categories for these maps.

I figured these 2 changes should go together since im adding a cosmic
map, and a cosmic category.

proof of nations spawning randomly and how the cosmic category looks in
the menu:


https://github.com/user-attachments/assets/b84bd3ef-6b8f-46fe-a6ea-ea5e79c6dc00

## 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

---------

Co-authored-by: Evan <evanpelle@gmail.com>

src/core/game/Game.ts

@@ -185,6 +185,7 @@ export enum GameMapType {
   ChoppingBlock = "Chopping Block",
   SoutheastAsia = "SoutheastAsia",
   MississippiRiver = "Mississippi River",
+  Titan = "Titan",
   HongKong = "Hong Kong",
   JuanDeFucaStrait = "Juan De Fuca Strait",
 }
@@ -265,8 +266,6 @@ export const mapCategories: Record<string, GameMapType[]> = {
   ],
   fantasy: [
     GameMapType.Pangaea,
-    GameMapType.Pluto,
-    GameMapType.Mars,
     GameMapType.DeglaciatedAntarctica,
     GameMapType.Achiran,
     GameMapType.BaikalNukeWars,
@@ -275,11 +274,16 @@ export const mapCategories: Record<string, GameMapType[]> = {
     GameMapType.Surrounded,
     GameMapType.TradersDream,
     GameMapType.Passage,
-    GameMapType.MilkyWay,
     GameMapType.Dyslexdria,
-    GameMapType.Luna,
     GameMapType.WorldInverted,
   ],
+  cosmic: [
+    GameMapType.Luna,
+    GameMapType.Mars,
+    GameMapType.Titan,
+    GameMapType.Pluto,
+    GameMapType.MilkyWay,
+  ],
   arcade: [
     GameMapType.TheBox,
     GameMapType.ChoppingBlock,

src/server/MapPlaylist.ts

@@ -108,6 +108,7 @@ const FREQUENCY: Partial<Record<GameMapName, number>> = {
   Svalmel: 8,
   TaiwanStrait: 5,
   TheBox: 3,
+  Titan: 3,
   TradersDream: 4,
   TwoLakes: 6,
   Venice: 6,