net: Make the user pass in the StackResources in init

By having the user pass in the resources, we can make them generic, this way
the user can choose the size of the individual resources

embassy-net/src/lib.rs

@@ -14,7 +14,7 @@ pub use config::{Config, Configurator, Event as ConfigEvent, StaticConfigurator}
 
 pub use device::{Device, LinkState};
 pub use packet_pool::{Packet, PacketBox, PacketBoxExt, PacketBuf, MTU};
-pub use stack::{init, is_config_up, is_init, is_link_up, run};
+pub use stack::{init, is_config_up, is_init, is_link_up, run, StackResources};
 
 #[cfg(feature = "tcp")]
 mod tcp_socket;