Added Australia map with 7 bots and their flags (#306)

This is a map of the Australian country. It has 7 bots - the 7 states of
the country. This is my first time making a pull request, so I'm sorry
if i messed something up or something doesn't work.

src/client/components/Maps.ts

@@ -17,6 +17,7 @@ export const MapDescription: Record<keyof typeof GameMapType, string> = {
   SouthAmerica: "South America",
   Britannia: "Britannia",
   GatewayToTheAtlantic: "Gateway to the Atlantic",
+  Australia: "Australia",
 };
 
 @customElement("map-display")