* improve documentation for the fullstack server context
* Add a section about axum integration to the crate root docs
* make serve_dioxus_application accept the cfg builder directly
* remove unused server_fn module
* improve fullstack config docs
* improve documentation for the server function macro
* fix axum router extension link
* Fix doc tests
* Fix launch builder
* Remove redundant server_only inside server function
* Fix isrg config path