really basic implementation of rpl types

crates/rpl/src/instructions/read.rs

@@ -0,0 +1,19 @@
+use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
+
+#[derive(Serialize, Deserialize, PartialEq, Eq, Debug)]
+pub struct Read {
+    pub source: SourceType,
+    pub format: SourceFormat,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Eq, Debug)]
+pub enum SourceType {
+    File(PathBuf),
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Eq, Debug)]
+pub enum SourceFormat {
+    Jpeg,
+    Png,
+}