Disable trains in public games (#1342)

## Description:

1. Disable trains in public games
2. add more checks so people can't build trains by bypass the UI.

## 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/core/execution/ConstructionExecution.ts

@@ -37,6 +37,15 @@ export class ConstructionExecution implements Execution {
 
   init(mg: Game, ticks: number): void {
     this.mg = mg;
+
+    if (this.mg.config().isUnitDisabled(this.constructionType)) {
+      console.warn(
+        `cannot build construction ${this.constructionType} because it is disabled`,
+      );
+      this.active = false;
+      return;
+    }
+
     if (this.tileOrCell instanceof Cell) {
       if (!this.mg.isValidCoord(this.tileOrCell.x, this.tileOrCell.y)) {
         console.warn(

src/core/execution/TrainStationExecution.ts

@@ -1,4 +1,4 @@
-import { Execution, Game, Player, Unit } from "../game/Game";
+import { Execution, Game, Player, Unit, UnitType } from "../game/Game";
 import { TrainStation } from "../game/TrainStation";
 import { PseudoRandom } from "../PseudoRandom";
 import { TrainExecution } from "./TrainExecution";
@@ -21,6 +21,13 @@ export class TrainStationExecution implements Execution {
 
   init(mg: Game, ticks: number): void {
     this.mg = mg;
+
+    if (this.mg.config().isUnitDisabled(UnitType.Train)) {
+      this.active = false;
+      console.warn(`train station is disabled`);
+      return;
+    }
+
     this.random = new PseudoRandom(mg.ticks());
 
     this.unit = this.player.units().find((unit) => unit.id() === this.unitId);

src/server/MapPlaylist.ts

@@ -1,5 +1,11 @@
 import { getServerConfigFromServer } from "../core/configuration/ConfigLoader";
-import { Difficulty, GameMapType, GameMode, GameType } from "../core/game/Game";
+import {
+  Difficulty,
+  GameMapType,
+  GameMode,
+  GameType,
+  UnitType,
+} from "../core/game/Game";
 import { PseudoRandom } from "../core/PseudoRandom";
 import { GameConfig } from "../core/Schemas";
 import { logger } from "./Logger";
@@ -61,6 +67,7 @@ export class MapPlaylist {
       gameMode: mode,
       playerTeams: numPlayerTeams,
       bots: 400,
+      disabledUnits: [UnitType.Train, UnitType.Factory],
     } satisfies GameConfig;
   }