Added nullable to most Content.Shared files (#3238)

* Add nullable to some Content.Shared files.

* Use [NotNullWhen(true)]

* Undo adding now redundant !'s

* Forgot one

* Add a ton more nullable

* You can guess

* Fix some issues

* It actually compiles now

* Auto stash before merge of "null2" and "origin/master"

* I lied

* enable annotations -> enable

* Revert ActionBlockerSystem.cs to original

* Fix ActionBlockerSystem.cs

* More nullable

* Undo some added exclamation marks

* Fix issues

* Update Content.Shared/Maps/ContentTileDefinition.cs

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

* Resolve some issues

* Remove unused method

* Fix more issues

* Fix more issues

* Fix more issues

* Fix more issues

* Fix issue, rollback SharedGhostComponent.cs

* Update submodule

* Fix issue, invert some if-statements to reduce nesting

* Revert RobustToolbox

* FIx things broken by merge

* Some fixes

- Replaced with string.Empty
- Remove some exclamation marks
- Revert file

* Some fixes

* Trivial #nullable enable

* Fix null ables

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>
Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>

Content.Shared/GameObjects/Components/Body/Networks/SharedBloodstreamComponent.cs

@@ -1,4 +1,5 @@
-using Content.Shared.Chemistry;
+#nullable enable
+using Content.Shared.Chemistry;
 using Robust.Shared.GameObjects;
 
 namespace Content.Shared.GameObjects.Components.Body.Networks

Content.Shared/GameObjects/Components/Body/Part/BodyPartCompatibility.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Body.Part

Content.Shared/GameObjects/Components/Body/Part/BodyPartSymmetry.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Body.Part

Content.Shared/GameObjects/Components/Body/Part/BodyPartType.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Body.Part

Content.Shared/GameObjects/Components/Body/Part/IBodyPartAdded.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Robust.Shared.GameObjects;
 
 namespace Content.Shared.GameObjects.Components.Body.Part

Content.Shared/GameObjects/Components/Body/Part/IBodyPartContainer.cs

@@ -1,4 +1,6 @@
-namespace Content.Shared.GameObjects.Components.Body.Part
+#nullable enable
+
+namespace Content.Shared.GameObjects.Components.Body.Part
 {
     /// <summary>
     ///     Defines a component as being capable of containing parts.

Content.Shared/GameObjects/Components/Body/Part/IBodyPartRemoved.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 
 namespace Content.Shared.GameObjects.Components.Body.Part
 {

Content.Shared/GameObjects/Components/Body/Part/Property/BodyPartPropertyComponent.cs

@@ -1,4 +1,5 @@
-using Robust.Shared.GameObjects;
+#nullable enable
+using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Body.Part.Property

Content.Shared/GameObjects/Components/Body/Part/Property/ExtensionComponent.cs

@@ -1,4 +1,5 @@
-using Robust.Shared.GameObjects;
+#nullable enable
+using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Body.Part.Property

Content.Shared/GameObjects/Components/Body/Part/Property/GraspComponent.cs

@@ -1,4 +1,5 @@
-using Robust.Shared.GameObjects;
+#nullable enable
+using Robust.Shared.GameObjects;
 
 namespace Content.Shared.GameObjects.Components.Body.Part.Property
 {

Content.Shared/GameObjects/Components/Body/Part/Property/IBodyPartProperty.cs

@@ -1,4 +1,5 @@
-using Robust.Shared.GameObjects;
+#nullable enable
+using Robust.Shared.GameObjects;
 
 namespace Content.Shared.GameObjects.Components.Body.Part.Property
 {

Content.Shared/GameObjects/Components/Body/Part/Property/LegComponent.cs

@@ -1,4 +1,5 @@
-using Robust.Shared.GameObjects;
+#nullable enable
+using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Body.Part.Property

Content.Shared/GameObjects/Components/Body/Preset/BodyPresetPrototype.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using System.Collections.Generic;
 using Content.Shared.GameObjects.Components.Body.Part;
 using Robust.Shared.Prototypes;
@@ -15,9 +16,9 @@ namespace Content.Shared.GameObjects.Components.Body.Preset
     [Serializable, NetSerializable]
     public class BodyPresetPrototype : IPrototype
     {
-        private string _id;
-        private string _name;
-        private Dictionary<string, string> _partIDs;
+        private string _id = string.Empty;
+        private string _name = string.Empty;
+        private Dictionary<string, string> _partIDs = new();
 
         [ViewVariables] public string ID => _id;
 

Content.Shared/GameObjects/Components/Body/Surgery/SurgeryType.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Body.Surgery

Content.Shared/GameObjects/Components/Body/Surgery/SurgeryUIKey.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Body.Surgery

Content.Shared/GameObjects/Components/Body/Surgery/SurgeryUIMessages.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using System.Collections.Generic;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization;

Content.Shared/GameObjects/Components/Body/Template/BodyTemplatePrototype.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using Content.Shared.GameObjects.Components.Body.Part;
@@ -16,13 +17,13 @@ namespace Content.Shared.GameObjects.Components.Body.Template
     [Serializable, NetSerializable]
     public class BodyTemplatePrototype : IPrototype
     {
-        private string _id;
-        private string _name;
-        private string _centerSlot;
-        private Dictionary<string, BodyPartType> _slots;
-        private Dictionary<string, List<string>> _connections;
-        private Dictionary<string, string> _layers;
-        private Dictionary<string, string> _mechanismLayers;
+        private string _id = string.Empty;
+        private string _name = string.Empty;
+        private string _centerSlot = string.Empty;
+        private Dictionary<string, BodyPartType> _slots = new();
+        private Dictionary<string, List<string>> _connections = new();
+        private Dictionary<string, string> _layers = new();
+        private Dictionary<string, string> _mechanismLayers = new();
 
         [ViewVariables] public string ID => _id;