Add pointing (#1435)

* Add pointing keybind and simple message

* Add turning the player when pointing

* Add pointing arrow

* Make the popup message appear on the pointing entity

* Add pointing to tiles and space and proper grammar

* Move pointing bind from HandsSystem to PointingSystem

* Add more messages for pointing depending on the viewer perspective

* Fix non nullable reference type

* Serialize pointing arrow duration

* Serialize pointing arrow step and add summaries

* Make arrow speed serializable and make it depend on frame time

* Add 0.2 second delay between pointings

* Add pointing arrow yaml examples

* Add the ability for pointing arrows to be rogue

* Remove rogue package reference

* Add point to verb

https://cdn.discordapp.com/attachments/313107470031650816/735268651636228197/unknown.png

* Add shift middle clicking an entity in the verb menu to point at it

* Add VV to PointingArrowComponent

* Increase pointing delay from 0.2 to 0.5 seconds

* Address reviews

* Fix nullability errors

* Separate pointing and rogue pointing code

* Fix rogue pointing arrow visuals

* Made rogue pointing arrow rotation adjustment readable for mortals

* Make rogue pointing arrows less destructive

* Cleanup more of the rogue pointing arrow code

Content.Shared/Input/ContentKeyFunctions.cs

@@ -29,5 +29,6 @@ namespace Content.Shared.Input
         public static readonly BoundKeyFunction OpenTileSpawnWindow = "OpenTileSpawnWindow";
         public static readonly BoundKeyFunction TakeScreenshot = "TakeScreenshot";
         public static readonly BoundKeyFunction TakeScreenshotNoUI = "TakeScreenshotNoUI";
+        public static readonly BoundKeyFunction Point = "Point";
     }
 }