feat: repr, codec

pkg/codec/codec.go

@@ -0,0 +1,12 @@
+package codec
+
+import "git.maximhutz.com/max/lambda/pkg/repr"
+
+type String string
+
+func (s String) Id() string { return "string" }
+
+type Codec[T, U repr.Repr] interface {
+	Encode(T) (U, error)
+	Decode(U) (T, error)
+}