Most of the refactor. Need to switch machines.

crates/core/src/class.rs

@@ -0,0 +1,10 @@
+use std::path::PathBuf;
+
+use serde::{Deserialize, Serialize};
+
+/// Data struct
+#[derive(Debug, Clone, Deserialize, Serialize, Hash, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Class {
+    pub path: PathBuf,
+    pub checksum: String,
+}