Add Antarctica Map (#544)

## Description:
This PR adds the new Deglaciated Antarctica map(suggested by Backn). It
has 9 nations - most of the country territorial claims on the continent
and the "Penguin Empire".

fixes #545 

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

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

Nikola123

---------

Co-authored-by: Loymdayddaud <145969603+TheGiraffe3@users.noreply.github.com>

src/client/components/Maps.ts

@@ -25,6 +25,7 @@ export const MapDescription: Record<keyof typeof GameMapType, string> = {
   BetweenTwoSeas: "Between Two Seas",
   KnownWorld: "Known World",
   FaroeIslands: "Faroe Islands",
+  DeglaciatedAntarctica: "Deglaciated Antarctica",
 };
 
 @customElement("map-display")

src/client/utilities/Maps.ts

@@ -4,6 +4,7 @@ import australia from "../../../resources/maps/AustraliaThumb.webp";
 import betweenTwoSeas from "../../../resources/maps/BetweenTwoSeasThumb.webp";
 import blackSea from "../../../resources/maps/BlackSeaThumb.webp";
 import britannia from "../../../resources/maps/BritanniaThumb.webp";
+import deglaciatedAntarctica from "../../../resources/maps/DeglaciatedAntarcticaThumb.webp";
 import europeClassic from "../../../resources/maps/EuropeClassicThumb.webp";
 import europe from "../../../resources/maps/EuropeThumb.webp";
 import faroeislands from "../../../resources/maps/FaroeIslandsThumb.webp";
@@ -63,6 +64,8 @@ export function getMapsImage(map: GameMapType): string {
       return knownworld;
     case GameMapType.FaroeIslands:
       return faroeislands;
+    case GameMapType.DeglaciatedAntarctica:
+      return deglaciatedAntarctica;
     default:
       return "";
   }