add RAW framer for passthrough

internal/framer/raw.go

@@ -0,0 +1,23 @@
+package framer
+
+type RawFramer struct{}
+
+func NewRawFramer() *RawFramer {
+	return &RawFramer{}
+}
+
+func (rf *RawFramer) Decode(data []byte) [][]byte {
+	return [][]byte{data}
+}
+
+func (rf *RawFramer) Encode(data []byte) []byte {
+	return data
+}
+
+func (rf *RawFramer) Clear() {
+	// NOTE(jwetzell): no internal state to clear
+}
+
+func (rf *RawFramer) Buffer() []byte {
+	return []byte{}
+}