Allow passing options to transformers

[itsdouges]

API for a program transformer is

function transformer(
  program: ts.Program,
  args: any // opts from ts config
) => ...

Atm I don't see a way to set options

const transformer = new Transformer()
  .addTransformer(classNamesTransformer) // what do
  .addMock({ name: '@compiled/css-in-js', content: `export const ClassNames: any = () => null` })
  .setFilePath('/index.tsx');

[marionebl]

Sure, let's add this. Will have to mull a bit what would be most appropriate, first stab:

const transformer = new Transformer()
  .addTransformer(transformer, transformerOptions)