[FEATURE REQUEST] Scripting

[RuggeroVisintin]

Is your feature request related to a problem? Please describe.
Users cannot add rich logic to their entities, for example, to react to collisions, add rich behaviour,s and more.

Describe the experience you'd like
Add the ability to define JavaScript scripts that can be executed at runtime

Describe alternatives you've considered

function onTriggerCb() {
  // Do things
}

function onInputEventCB() {
  // Do things
}

Additional context
Will surely require many changes to the engine