Add Italia and Straight of Gibraltar maps (#1285)

## Description:

Add Italia and Straight of Gibraltar

Merging this directly into v23 because the map generation logic changed.
Also removed last pixel if odd. The map dimensions must be even.

## 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
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:
evan

src/scripts/TerrainMapGenerator.ts

@@ -36,12 +36,15 @@ export async function generateMap(
     `Processing Map: ${name}, dimensions: ${img.width}x${img.height}`,
   );
 
-  const terrain: Terrain[][] = Array(img.width)
-    .fill(null)
-    .map(() => Array(img.height).fill(null));
+  const width = img.width - (img.width % 2);
+  const height = img.height - (img.height % 2);
 
-  for (let x = 0; x < img.width; x++) {
-    for (let y = 0; y < img.height; y++) {
+  const terrain: Terrain[][] = Array(width)
+    .fill(null)
+    .map(() => Array(height).fill(null));
+
+  for (let x = 0; x < width; x++) {
+    for (let y = 0; y < height; y++) {
       const color = img.getPixelRGBA(x, y);
       const alpha = color & 0xff;
       const blue = (color >> 8) & 0xff;

src/scripts/generateTerrainMaps.ts

@@ -29,6 +29,8 @@ const maps = [
   "FalklandIslands",
   "Baikal",
   "Halkidiki",
+  "Italia",
+  "StraitOfGibraltar",
 ];
 
 const removeSmall = true;