Add ability to block/wait until standalone build succeeds or fails

[mglagola]

@fson - Per our discussion to merge some of exptool functionality with exp!

[fson]

This is awesome! Thanks for the pull request @mglagola.

Before starting to wait, we could show the "You can monitor the build at..." so people can go view the logs while waiting.

@anp had an idea that we could make this the default now, since it's almost always what you'd want. We can have --no-wait, which would revert back to the old behavior (exit once the build has started).

[fson]

This sometimes gets repeated quite a few times. Maybe we can just show a spinner and some message like this?

Waiting for build to complete. You can press Ctrl+C to exit.

We use the @expo/simple-spinner library for spinners, here's an example of how to use it:

exp/src/commands/diagnostics.js

Lines 16 to 20 in 95f81c9

	simpleSpinner.start();
	const { url } = await Diagnostics.getDeviceInfoAsync({
	uploadLogs: true,
	});
	simpleSpinner.stop();

[mglagola]

@fson Lmk what you think, added simpleSpinner, changed --wait to --no-wait and made sure You can monitor the build at... is always logged

[fson]

Looks great! I’m going to give this a final test in the morning and merge after that 👍

[fson]

Merged. Thanks again @mglagola, this makes the build command so much nicer!