feat: First version of broker based WireGuard PSK interface

This allows us to run with minimal priviledges in the Rosenpass process itself

wireguard-broker/src/lib.rs

@@ -0,0 +1,15 @@
+use std::result::Result;
+
+pub trait WireGuardBroker {
+    type Error;
+
+    fn set_psk(
+        &mut self,
+        interface: &str,
+        peer_id: [u8; 32],
+        psk: [u8; 32],
+    ) -> Result<(), Self::Error>;
+}
+
+pub mod api;
+pub mod netlink;