Add await for Script Execution

**Describe the problem you have/What new integration you would like**

Most of my scripts have delays, so when I call `script.execute`, I immediately follow it up with `script.wait`.
```
- script.execute: move_servo_to_position
- script.wait: move_servo_to_position
```

I'm calling 10+ scripts, so this quickly gets noisy.

**Please describe your use case for this integration and alternatives you've tried:**

This reminds me of JavaScript. When you call an async function you can either `await` it, making the code synchronous; or you can not `await`, making it asynchronous.

I would like a `script.await_execute` or something along those lines.

Currently I'm just calling `script.wait` after all `script.execute`'s.

**Additional context**

Start with the issue's current script.execute and script.wait usage and compare it with the requested script.await_execute behavior. No files, tests, or implementation entry points are mentioned; done would mean defining and implementing the awaited execution behavior so repeated script.wait calls are no longer needed.

Written by the indexing model from the issue text.