Initial node implementation (#4)

Reviewed-on: #4
Co-authored-by: Zack <zack@bfpower.io>
Co-committed-by: Zack <zack@bfpower.io>

node/src/lib.rs

@@ -0,0 +1,10 @@
+#![no_std]
+#![feature(async_fn_in_trait)]
+
+pub mod transducer;
+
+pub mod cell {
+    pub use physical::cell::*;
+}
+
+pub use physical::CriticalError;