feat: add jello-types crate and update dependencies with backtrace support

jello-types/src/lib.rs

@@ -0,0 +1,6 @@
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub struct User {
+    id: uuid::Uuid,
+    name: Option<String>,
+    primary_image_tag: Option<String>,
+}