Add boilerplate for a SysEx message trait

src/midi.rs

@@ -2,6 +2,8 @@
 
 use midi_consts::channel_event as midi;
 
+pub mod sysex;
+
 pub use midi_consts::channel_event::control_change;
 
 /// Determines which note events a plugin receives.

src/midi/sysex.rs

@@ -0,0 +1,9 @@
+//! Traits for working with MIDI SysEx data.
+
+/// A type that can be converted to and from byte buffers containing MIDI SysEx messages.
+pub trait SysExMessage {
+    /// The maximum SysEx message size, in bytes.
+    const MAX_BUFFER_SIZE: usize;
+
+    // TODO: Conversion functions
+}