Add Two Lakes (#2743)

## Description:
This PR adds the Two Lakes map, based on the irl area around lake Ohrid
and lake Prespa

Describe the PR.

## 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:

DISCORD_USERNAME
Nikola123

src/server/MapPlaylist.ts

@@ -57,6 +57,7 @@ const frequency: Partial<Record<GameMapName, number>> = {
   Svalmel: 8,
   World: 8,
   Lemnos: 3,
+  TwoLakes: 6,
 };
 
 interface MapWithMode {