Gun refactor (#8301)

Co-authored-by: Kara <lunarautomaton6@gmail.com>
Co-authored-by: T-Stalker <le0nel_1van@hotmail.com>
Co-authored-by: T-Stalker <43253663+DogZeroX@users.noreply.github.com>
Co-authored-by: ElectroJr <leonsfriedrich@gmail.com>
Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Shared/Weapons/Ranged/IShootable.cs

@@ -0,0 +1,6 @@
+namespace Content.Shared.Weapons.Ranged;
+
+/// <summary>
+/// Interface that says this can be shot from a gun. Exists to facilitate hitscan OR prototype shooting.
+/// </summary>
+public interface IShootable {}