Implement websocket configuration

There is currently no configuration for the web socket mechanism at `libs/dev-disp-comm/src/websocket/discovery.rs`.

We should implement one, using the configuration structs defined at `libs/dev-disp-core/src/core/configuration_file.rs`

Look at the existing websocket discovery code in libs/dev-disp-comm/src/websocket/discovery.rs and the configuration structs in libs/dev-disp-core/src/core/configuration_file.rs. Understand how configuration is loaded and applied elsewhere in the project. The task is to wire the configuration to the websocket mechanism, likely by adding fields to the config struct and reading them in the discovery module. Test by running any existing websocket or configuration tests.

Scritto dal modello di indicizzazione a partire dal testo della issue.