added detoxReuse option

[doronpr]

No description provided.

[LeoNatan]

@rotemmiz Can we add this to Detox CLI?

[rotemmiz]

Sorry for taking too long to respond to this. I really like this feature and I believe it has great value for dev flow.
This is an old pull request, and code was changed significantly since the PR was first submitted.

In order to support this feature, we can use relaunchApp with different params.

Simulator.js

  async prepare() {
    this._simulatorUdid = await this._fbsimctl.list(this._deviceConfig.name);
    this._bundleId = await this._getBundleIdFromApp(this._deviceConfig.binaryPath);
    await this._fbsimctl.boot(this._simulatorUdid);
    await this.relaunchApp({delete: true});
  }

@doronpr, do you think you can resubmit this PR ?
Huge thanks!

[doronpr]

closing in favour of #105