Add Montreal (#2081)

## Description:
This PR adds the Montreal map that was used in OFM with some revisions,
including adding some river and changing the overall topography.

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

resources/lang/en.json

@@ -178,7 +178,8 @@
     "straitofgibraltar": "Strait of Gibraltar",
     "italia": "Italia",
     "yenisei": "Yenisei",
-    "pluto": "Pluto"
+    "pluto": "Pluto",
+    "montreal": "Montreal"
   },
   "map_categories": {
     "continental": "Continental",

resources/maps/montreal/manifest.json

@@ -0,0 +1,33 @@
+{
+  "map": {
+    "height": 1500,
+    "num_land_tiles": 1957697,
+    "width": 1530
+  },
+  "mini_map": {
+    "height": 750,
+    "num_land_tiles": 484387,
+    "width": 765
+  },
+  "name": "Montreal",
+  "nations": [
+    {
+      "coordinates": [800, 430],
+      "flag": "ca",
+      "name": "Laval",
+      "strength": 2
+    },
+    {
+      "coordinates": [1110, 930],
+      "flag": "ca",
+      "name": "Montreal",
+      "strength": 2
+    },
+    {
+      "coordinates": [1220, 1360],
+      "flag": "ca",
+      "name": "Hochelaga Archipelago",
+      "strength": 2
+    }
+  ]
+}