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>

map-generator/assets/maps/titan/info.json

@@ -0,0 +1,117 @@
+{
+  "name": "Titan",
+  "nations": [
+    {
+      "name": "Stone-Keeping Purple Aliens",
+      "flag": "Purple Flag"
+    },
+    {
+      "name": "European Space Agency",
+      "flag": "eu"
+    },
+    {
+      "name": "UKSA",
+      "flag": "gb"
+    },
+    {
+      "name": "CNSA",
+      "flag": "cn"
+    },
+    {
+      "name": "NASA",
+      "flag": "us"
+    },
+    {
+      "name": "Roscosmos",
+      "flag": "ru"
+    },
+    {
+      "name": "JAXA",
+      "flag": "jp"
+    },
+    {
+      "name": "UAESA",
+      "flag": "ae"
+    },
+    {
+      "name": "NATA",
+      "flag": "kp"
+    },
+    {
+      "name": "CONAE",
+      "flag": "ar"
+    },
+    {
+      "name": "ASA",
+      "flag": "au"
+    },
+    {
+      "name": "UEB",
+      "flag": "br"
+    },
+    {
+      "name": "CSA",
+      "flag": "ca"
+    },
+    {
+      "name": "CNES",
+      "flag": "fr"
+    },
+    {
+      "name": "ISRO",
+      "flag": "in"
+    },
+    {
+      "name": "Iranian Space Agency",
+      "flag": "ir"
+    },
+    {
+      "name": "Israel Space Agency",
+      "flag": "il"
+    },
+    {
+      "name": "ASI",
+      "flag": "it"
+    },
+    {
+      "name": "KARI",
+      "flag": "kr"
+    },
+    {
+      "name": "MSA",
+      "flag": "mx"
+    },
+    {
+      "name": "NZSA",
+      "flag": "nz"
+    },
+    {
+      "name": "SUPARCO",
+      "flag": "pk"
+    },
+    {
+      "name": "POLSA",
+      "flag": "pl"
+    },
+    {
+      "name": "SNSA",
+      "flag": "se"
+    },
+    {
+      "name": "SSAU",
+      "flag": "ua"
+    },
+    {
+      "name": "LuxSpace",
+      "flag": "lu"
+    },
+    {
+      "name": "TUA",
+      "flag": "tr"
+    },
+    {
+      "name": "UNOOSA",
+      "flag": "un"
+    }
+  ]
+}

map-generator/main.go

@@ -103,6 +103,7 @@ var maps = []struct {
 	{Name: "svalmel"},
 	{Name: "taiwanstrait"},
 	{Name: "thebox"},
+	{Name: "titan"},
 	{Name: "tourney1"},
 	{Name: "tourney2"},
 	{Name: "tourney3"},