Material cleanup (#4025)

* work

* more work

Content.Shared/Materials/MaterialPrototype.cs

@@ -0,0 +1,50 @@
+#nullable enable
+using Content.Shared.Stacks;
+using Robust.Shared.Maths;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+using Robust.Shared.Utility;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Shared.Materials
+{
+    /// <summary>
+    ///     Materials are read-only storage for the properties of specific materials.
+    ///     Properties should be intrinsic (or at least as much is necessary for game purposes).
+    /// </summary>
+    [Prototype("material")]
+    public class MaterialPrototype : IPrototype, IInheritingPrototype
+    {
+        [ViewVariables]
+        [DataField("parent")]
+        public string? Parent { get; } = null;
+
+        [ViewVariables]
+        [DataField("abstract")]
+        public bool Abstract { get; } = false;
+
+        [ViewVariables]
+        [DataField("id", required: true)]
+        public string ID { get; } = default!;
+
+        [ViewVariables]
+        [DataField("stack", customTypeSerializer:typeof(PrototypeIdSerializer<StackPrototype>))]
+        public string? StackId { get; } = null;
+
+        [ViewVariables]
+        [DataField("name")]
+        public string Name { get; } = "unobtanium";
+
+        [ViewVariables]
+        [DataField("color")]
+        public Color Color { get; } = Color.Gray;
+
+        /// <summary>
+        ///     An icon used to represent the material in graphic interfaces.
+        /// </summary>
+        [ViewVariables]
+        [DataField("icon")]
+        public SpriteSpecifier Icon { get; } = SpriteSpecifier.Invalid;
+    }
+}