Add scroll zooming for admins and ghosts (#14061)

* Add scroll zooming for admins

* Bunch of work

* Kinda better kinda worse scrolling

* shared code

* nyoom

* house md

* Fixes

* Log spam

* Fixes

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Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Client/Input/ContentContexts.cs

@@ -28,6 +28,9 @@ namespace Content.Client.Input
             common.AddFunction(ContentKeyFunctions.TakeScreenshot);
             common.AddFunction(ContentKeyFunctions.TakeScreenshotNoUI);
             common.AddFunction(ContentKeyFunctions.Point);
+            common.AddFunction(ContentKeyFunctions.ZoomOut);
+            common.AddFunction(ContentKeyFunctions.ZoomIn);
+            common.AddFunction(ContentKeyFunctions.ResetZoom);
 
             // Not in engine, because engine cannot check for sanbox/admin status before starting placement.
             common.AddFunction(ContentKeyFunctions.EditorCopyObject);