Add option to wrap lib in get() similar to @motiondeveloper/aefunctions

[fartinmartin]

In cases where functions in your library reference other values, like:

// example.jsx
{
  someNumber: 5,
  someFunction(inputParamaters) {
    return someNumber;
  },
}

You will get a ReferenceError: someNumber is not defined expression error. If you attempt to reference via this.someNumber you won't get an expression error, but the value resolves to undefined.

// textLayer.sourceText expression
const { someFunction } = footage("example.jsx").sourceData;
someFunction(); // typeof someFunction() === undefined

You've solved this in your aefunctions.jsx lib by wrapping all of your libs functions in a single getFunctions() method. This PR adds similar functionality to rollup-plugin-ae-jsx via a wrap: true option.

Additionally, this PR will format your .jsx with TypeScript (seems to do a better job than MagicString.trim().indent()) but given that project is written in JavaScript maybe it's not a great idea to introduce TypeScript just for this, haha!