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

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

@@ -0,0 +1,25 @@
+{
+  "name": "Two Lakes",
+  "nations": [
+    {
+      "coordinates": [1025, 750],
+      "name": "Galicica"
+    },
+    {
+      "coordinates": [1815, 820],
+      "name": "Pelister"
+    },
+    {
+      "coordinates": [920, 1250],
+      "name": "Podgorie"
+    },
+    {
+      "coordinates": [100, 1410],
+      "name": "Valamara"
+    },
+    {
+      "coordinates": [1320, 1485],
+      "name": "Prespa"
+    }
+  ]
+}

map-generator/main.go

@@ -60,6 +60,7 @@ var maps = []struct {
 	{Name: "svalmel"},
 	{Name: "world"},
 	{Name: "lemnos"},
+	{Name: "twolakes"},
 	{Name: "big_plains", IsTest: true},
 	{Name: "half_land_half_ocean", IsTest: true},
 	{Name: "ocean_and_land", IsTest: true},