Add types for logger

Add a type file (.d.ts) for the 5app logger.
Suggested types:


```

declare class Logger {
    static info: (...args: any[]) => void;
    static error: (...args: any[]) => void;
    static warn: (...args: any[]) => void;
    static debug: (...args: any[]) => void
}

declare module '@5app/logger' {
    export = Logger;
}
```