Usage readme and compatibility

Hello- does this plugin works with new OpenSAMP?
If so- are there any examples on where to put stuff, how to configure etc?

Using TS I did a simple snippet- but don't know how to run it 

```typescript
/// <reference path="node_modules/@sa-mp/node/@types/index.d.ts" />
samp.on(EVENT_GAME_MODE_INIT, () => {
    console.log('Game mode is loaded - from sampjs :)');
});
```