Port cleanbots from Nyano (#9853)

Content.Server/AI/EntitySystems/GoToPuddleSystem.cs

@@ -0,0 +1,20 @@
+using Content.Server.Fluids.Components;
+
+namespace Content.Server.AI.EntitySystems
+{
+    public sealed class GoToPuddleSystem : EntitySystem
+    {
+        [Dependency] private readonly EntityLookupSystem _lookup = default!;
+
+        public EntityUid GetNearbyPuddle(EntityUid cleanbot, float range = 10)
+        {
+            foreach (var entity in _lookup.GetEntitiesInRange(cleanbot, range))
+            {
+                if (HasComp<PuddleComponent>(entity))
+                    return entity;
+            }
+
+            return default;
+        }
+    }
+}