Convert RandomPlant to entity system (#5952)

Co-authored-by: ShadowCommander <10494922+ShadowCommander@users.noreply.github.com>

Content.Server/Plants/Systems/RandomPottedPlantSystem.cs

@@ -0,0 +1,37 @@
+using Content.Server.Plants.Components;
+using Robust.Server.GameObjects;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Random;
+
+namespace Content.Server.Plants.Systems
+{
+    public class RandomPottedPlantSystem : EntitySystem
+    {
+        [Dependency] private readonly IRobustRandom _random = default!;
+
+        private static readonly string[] RegularPlantStates =
+        {
+            "plant-01", "plant-02", "plant-03", "plant-04", "plant-05",
+            "plant-06", "plant-07", "plant-08", "plant-09", "plant-10",
+            "plant-11", "plant-12", "plant-13", "plant-14", "plant-15",
+            "plant-16", "plant-17", "plant-18", "plant-19", "plant-20",
+            "plant-21", "plant-22", "plant-23", "plant-24", "applebush"
+        };
+        private static readonly string[] PlasticPlantStates =
+        {
+            "plant-26", "plant-27", "plant-28", "plant-29"
+        };
+
+        public override void Initialize()
+        {
+            SubscribeLocalEvent<RandomPottedPlantComponent, MapInitEvent>(OnMapInit);
+        }
+
+        private void OnMapInit(EntityUid uid, RandomPottedPlantComponent component, MapInitEvent args)
+        {
+            component.State ??= _random.Pick(component.Plastic ? PlasticPlantStates : RegularPlantStates);
+            Comp<SpriteComponent>(uid).LayerSetState(0, component.State);
+        }
+    }
+}