Make indestructible tiles not breakable by explosions (#34339)

* No more Ai Spacing

* Move guard into earlier guard statement

Content.Server/Explosion/EntitySystems/ExplosionSystem.Processing.cs

@@ -512,7 +512,8 @@ public sealed partial class ExplosionSystem
         List<(Vector2i GridIndices, Tile Tile)> damagedTiles,
         ExplosionPrototype type)
     {
-        if (_tileDefinitionManager[tileRef.Tile.TypeId] is not ContentTileDefinition tileDef)
+        if (_tileDefinitionManager[tileRef.Tile.TypeId] is not ContentTileDefinition tileDef
+            || tileDef.Indestructible)
             return;
 
         if (!CanCreateVacuum)