add readme

[sibelius]

it would be cool to have a readme to tell what this project is all about

it also good to have a list of issues that needs to be tackled

[MarcoScabbiolo]

Sure, will do, I wanted to have a POC of the new architecture working first so we have a good starting point.

[MarcoScabbiolo]

I've finished with the basics for Android (iOS native side is still pending). I've isolated the core and the barcode reading features into their own packages. All of the Android code is now written in Kotlin, and the JS side in Typescript, fully typed.

I've made some changes on both the native and JS side to provide a more clean interface more than anything. There is still a lot of testing to be made, I'll keep adding use cases to both examples to test them.

But first I will add a Readme and create some issues so everyone can jump aboard, the new architecture is working really well and we can even support user-made plugins!

[tewarig]

I can help in improving Read me.