[Fix] Pathfinding bug in Warship Warship (#4274)

> **Before opening a PR:** discuss new features on
[Discord](https://discord.gg/K9zernJB5z) first, and file bugs or small
improvements as
[issues](https://github.com/openfrontio/OpenFrontIO/issues/new/choose).
You must be assigned to an `approved` issue — unsolicited PRs will be
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**Add approved & assigned issue number here:**

Resolves #4273 

## Description:

Minor pathfinding bugs to do with the weird corners in Warship Warship.
Boats are unable to exit some of the corners for no reason.
This bugfix simply adds 2 blue pixels to all the glitched corners.
Credit to @RickD004 for adding the pixels


<img width="1265" height="674" alt="Screenshot 2026-06-13 223641"
src="https://github.com/user-attachments/assets/5802d5ae-14cb-4159-ab70-454e1c73dfae"
/>
<img width="1262" height="688" alt="Screenshot 2026-06-13 223702"
src="https://github.com/user-attachments/assets/c3d5c1d5-98f6-4322-87b0-134cfc916d1d"
/>

## 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

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

DISCORD_USERNAME crunchybbbbb

resources/maps/warshipwarship/manifest.json

@@ -95,17 +95,17 @@
   "id": "WarshipWarship",
   "map": {
     "height": 1396,
-    "num_land_tiles": 1122359,
+    "num_land_tiles": 1122343,
     "width": 3000
   },
   "map16x": {
     "height": 349,
-    "num_land_tiles": 68556,
+    "num_land_tiles": 68553,
     "width": 750
   },
   "map4x": {
     "height": 698,
-    "num_land_tiles": 279836,
+    "num_land_tiles": 279822,
     "width": 1500
   },
   "multiplayer_frequency": 3,