add: medical patches (#194)

* add: medical patches

* removing some comments

* some fixes

* oops

Content.Shared/Chemistry/Components/PatchComponent.cs

@@ -0,0 +1,42 @@
+using Content.Shared.DoAfter;
+using Content.Shared.FixedPoint;
+using Robust.Shared.GameStates;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Chemistry.Components;
+
+[Serializable, NetSerializable]
+public sealed partial class PatchDoAfterEvent : SimpleDoAfterEvent
+{
+}
+
+/// <summary>
+/// Implements draw/inject behavior for droppers and syringes.
+/// </summary>
+/// <remarks>
+/// Can optionally support both
+/// injection and drawing or just injection. Can inject/draw reagents from solution
+/// containers, and can directly inject into a mobs bloodstream.
+/// </remarks>
+
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class PatchComponent : Component
+{
+
+    [ViewVariables, AutoNetworkedField]
+    public FixedPoint2 CurrentVolume;
+
+    [ViewVariables, AutoNetworkedField]
+    public FixedPoint2 TotalVolume;
+
+    [DataField("solutionName")]
+    public string SolutionName = "patch";
+
+    [DataField("onlyMobs")]
+    public bool OnlyMobs = true;
+
+    [ViewVariables(VVAccess.ReadWrite)]
+    [DataField("delay")]
+    public TimeSpan Delay = TimeSpan.FromSeconds(5);
+
+}