add events.reset

doc/en/scripting/events.md

@@ -145,6 +145,12 @@ events.on(code: str, handler: function)
 
 Adds an event handler by its code, not limited to the standard ones.
 
+```lua
+events.reset(code: str, [optional] handler: function)
+```
+
+Removes the event, adding a handler if specified.
+
 ```lua
 events.emit(code: str, args...) -> bool
 ```