Added support for new Rive databinding api

[JCash]

⚠️ Breaking Change!!! ⚠️

This is a complete overhaul of the Lua bindings. See the rive.script_api file, or use the editor code completions to read more.

• Docs are generated (as there are no docs to read from)
• rive.* functions work on the Defold components, to get or set e.g. the default file, artboard, statemachine, and viewmodel
• rive.cmd.* functions are a 1:1 mapping to the rive api in command_queue.hpp.
• Can register global listener callbacks for the different handle types, and also properties
• The api is asynchronous, and as such there are no "getters". Use the listeners

Removed or disabled functionalities, related to the support of the command queue api:

• There is no way to attach a game object to a Rive bone in e.g. a character
• Playing individual animations is not supported anymore.
  • No events are received from animation finished or animation looping
• Each rive file needs to have at least one state machine

FIxes #198