feat: create [...catch_all] route

[Valerioageno]

Context & Description

This PR adds the support for the [...catch_all] routes.

No changes to the existing user interactions.

The only internal thing changed is the endpoint to the data only API __tuono/data/* that removes the */data.json extension. This because axum doesn't accept any key after the * wildcard (doc)

The API does not change:

// test/[...catch_all].rs
#[tuono_lib::handler]
async fn catch_all_route_example(req: Request) -> Response {
  
    let value = req.params.get("catch_all").unwrap();

    println!("{value}");

    // ...
}

Closing ticket #209