updated docs

docs/lua/Signal.lua

@@ -10,7 +10,37 @@ Barotrauma source code: [Signal.cs](https://github.com/evilfactory/Barotrauma-lu
 
 Signal = {}
 
---- Creates a Signal.
+--- Instantiates a new Signal.
 -- @treturn Signal
 -- @realm shared 
-function Signal.Create(stringValue, stepsTaken, characterSender, itemSource, power, strength) end
+function Signal.__new(stringValue, stepsTaken, characterSender, itemSource, power, strength) end
+
+---
+-- value, String value of the signal.
+-- @realm shared
+-- @string value
+
+---
+-- stepsTaken = 1
+-- @realm shared
+-- @number stepsTaken
+
+---
+-- sender = nil
+-- @realm shared
+-- @Character sender
+
+---
+-- source = nil
+-- @realm shared
+-- @Item source
+
+---
+-- power = 0
+-- @realm shared
+-- @number power
+
+---
+-- strength = 1
+-- @realm shared
+-- @number strength