Support iOS polyfills

[KVSRoyal]

Is your feature request related to a problem? Please describe.

I am frustrated when I need to add polyfills for iOS JSBasePlugins. I would like to be able to add the polyfills through a plugin just for that. However, such a plugin would be just a NativePlugin and not a JSBasePlugin. So it would be applied after the JSBasePlugins are loaded. Which means the polyfills would not exist in some contexts when I expect them to. #772 is an example of this and goes into more detail. Even if I apply such a plugin before the JSBasePlugins, player will load it after them.

For example, if I had a class ConsolePolyfillPlugin: NativePlugin that provided console.log, this is how it would work right now:

export class ReproPlugin {
  name = 'repro';

  constructor() {
    console.log('I will NOT be logged');
  }

  apply(player: Player) {
    console.log('I will NOT be logged')

    player.hooks.view.tap(this.name, () => {
      console.log('I will be logged')
    });

    console.log('I will NOT be logged')
  }

  func foo() {
    console.log('I MAY be logged depending on where I am called from.')
  }
}

Describe the solution you'd like

I would like to be able to add a plugin that applies polyfills, like setInterval or console.log, and have it actually be applied in the order I expect it to and the polyfills exist reliably.

Additional context