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

jello-types/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "jello-types"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+serde = { version = "1.0.228", features = ["derive"] }
+uuid = { version = "1.18.1", features = ["serde"] }

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>,
+}