Move map generator into main repo (#2006)

## Description:

Move the MapGenerator repo into OpenFrontIO so we don't need to copy
generated map files over.

## 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:

evan

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

@@ -0,0 +1,71 @@
+{
+  "name": "Baikal",
+  "nations": [
+    {
+      "coordinates": [695, 665],
+      "name": "Irkutsk Oblast",
+      "strength": 2,
+      "flag": "bai_irk"
+    },
+    {
+      "coordinates": [2188, 1001],
+      "name": "Republic of Buryatia",
+      "strength": 2,
+      "flag": "bai_bur"
+    },
+    {
+      "coordinates": [754, 1170],
+      "name": "Olkhon Island",
+      "strength": 1,
+      "flag": "ru"
+    },
+    {
+      "coordinates": [1025, 831],
+      "name": "Cape Khoboy",
+      "strength": 1,
+      "flag": "ru"
+    },
+    {
+      "coordinates": [361, 1195],
+      "name": "Ogoi Island",
+      "strength": 1,
+      "flag": "ru"
+    },
+    {
+      "coordinates": [1805, 115],
+      "name": "Bolshoy Ushkan Island",
+      "strength": 1,
+      "flag": "ru"
+    },
+    {
+      "coordinates": [2030, 335],
+      "name": "Svyatoy Nos Peninsula",
+      "strength": 2,
+      "flag": "ru"
+    },
+    {
+      "coordinates": [2194, 659],
+      "name": "Chivyrkuisky Bay",
+      "strength": 1,
+      "flag": "ru"
+    },
+    {
+      "coordinates": [309, 230],
+      "name": "Chanchur",
+      "strength": 2,
+      "flag": "ru"
+    },
+    {
+      "coordinates": [2165, 1439],
+      "name": "Zabaykalsky National Park",
+      "strength": 1,
+      "flag": "ru"
+    },
+    {
+      "coordinates": [132, 751],
+      "name": "Listvyanka",
+      "strength": 1,
+      "flag": "ru"
+    }
+  ]
+}