saving and loading library implemented

src/structs.rs

@@ -0,0 +1,14 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Default, Deserialize, Serialize, Debug)]
+pub struct Library {
+    pub current_shelf: u8,
+    pub shelves: Vec<Shelf>,
+}
+
+#[derive(Deserialize, Serialize, Debug)]
+pub struct Shelf {
+    pub id: u8,
+    pub name: String,
+    pub content: Vec<String>,
+}