initial arhitectural overhaul

Signed-off-by: Sienna Meridian Satterwhite <sienna@r3t.io>

crates/libmarathon/src/error.rs

@@ -0,0 +1,15 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum ChatDbError {
+    #[error("Database error: {0}")]
+    Database(#[from] rusqlite::Error),
+
+    #[error("Not found: {0}")]
+    NotFound(String),
+
+    #[error("Invalid data: {0}")]
+    InvalidData(String),
+}
+
+pub type Result<T> = std::result::Result<T, ChatDbError>;