Puddles & spreader refactor (#15191)

Content.Server/Spreader/GrowingKudzuComponent.cs

@@ -0,0 +1,22 @@
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom;
+
+namespace Content.Server.Spreader;
+
+[RegisterComponent, Access(typeof(KudzuSystem))]
+public sealed class GrowingKudzuComponent : Component
+{
+    /// <summary>
+    /// At level 3 spreading can occur; prior to that we have a chance of increasing our growth level and changing our sprite.
+    /// </summary>
+    [DataField("growthLevel")]
+    public int GrowthLevel = 1;
+
+    [DataField("growthTickChance")]
+    public float GrowthTickChance = 1f;
+
+    /// <summary>
+    /// The next time kudzu will try to tick its growth level.
+    /// </summary>
+    [DataField("nextTick", customTypeSerializer:typeof(TimeOffsetSerializer))]
+    public TimeSpan NextTick = TimeSpan.Zero;
+}