Rust server handler

Simple and clean, here's how you can set it up! 👇

```rust /- Imports -/ use fastserve::{ ServerOptions, RouteRoot as RR, RouteValue as RV, Statics };

fn main() {

/*- The route-structure -*/
let routes:Vec<RR> = vec![
    RR::Endpoint("",                         RV::File("index.html")),

    RR::Stack("/", vec![
        RR::Endpoint("hejs",                 RV::Function(|_,_,_| {})),
        RR::Endpoint("function",             RV::Function(|_,_,_| {})),
    ]),

    RR::Stack("/api", vec![
        RR::Stack("/v2", vec![
            RR::Endpoint("some_endpoint",    RV::File("someFile.html")),
        ]),
    ]),
];

/*- Start the server -*/
fastserve::start(ServerOptions {
    url         : "127.0.0.1",      // Use 0.0.0.0 if using ex Docker
    port        : 8081,             // The http-port you want to use
    numthreads  : 10,               // Amount of clients that can join concurrently
    routes      : routes.clone(),   // The route-structure
    log_status  : true,             // Will log things, like when the server starts
    on_connect  : Some(on_connect), // Do something when a user is connected
    statics   : Statics {
        dir      : "./static",       // The directory where you put your static files
        custom404: Some("404.html"), // Defaults to ''404.html' if None
        serve    : true, // Serve all files in static dir even if not provided in routes
    },
});

}

fn onconnect(request:&String) { println!("{:#?}", "someone connected!"); } ```