get most stuff working again, by upgrading to newer esp-hal version

this involved adding a lot of code from the develop branch step by step
there are still some bugs, but at least i can get into the web interface
and configure stuff again \o/ … measuring and pumping is working as well

rust/src/webserver/file_manager.rs

@@ -5,7 +5,7 @@ use alloc::format;
 use alloc::string::String;
 use edge_http::io::server::Connection;
 use edge_http::Method;
-use embedded_io_async::{Read, Write};
+use edge_nal::io::{Read, Write};
 use log::info;
 
 pub(crate) async fn list_files<T, const N: usize>(