Implement a new "Search" mode with a WebSocket server #270

The idea would be to launch the NodeSecure UI like nsecure search and be able to search one or many packages like preview

Doing so could allow us in the long term to host a NodeSecure version online.

I think to setup that idea we need to iterate with multiple steps

• refactor front-end to allow to switch between search (or maybe between one/many packages)
• integrate websocket with a real-time usage of Scanner.
• rework caching (at least provide more options).