Wire live serial data into matrix renderer

src/serial_core/codec.rs

@@ -0,0 +1,7 @@
+use crate::serial_core::error::CodecError;
+use std::time::Instant;
+
+pub trait Codec<F> {
+    fn decode(&mut self, input: &[u8], session_started_at: Instant) -> Result<Vec<F>, CodecError>;
+    fn encode(&self, frame: &F) -> Result<Vec<u8>, CodecError>;
+}