add data packages and remove empty submodule

packages/data/ourdb/src/error.rs

@@ -0,0 +1,41 @@
+use thiserror::Error;
+
+/// Error types for OurDB operations
+#[derive(Error, Debug)]
+pub enum Error {
+    /// IO errors from file operations
+    #[error("IO error: {0}")]
+    Io(#[from] std::io::Error),
+
+    /// Data corruption errors
+    #[error("Data corruption: {0}")]
+    DataCorruption(String),
+
+    /// Invalid operation errors
+    #[error("Invalid operation: {0}")]
+    InvalidOperation(String),
+
+    /// Lookup table errors
+    #[error("Lookup error: {0}")]
+    LookupError(String),
+
+    /// Record not found errors
+    #[error("Record not found: {0}")]
+    NotFound(String),
+
+    /// Other errors
+    #[error("Error: {0}")]
+    Other(String),
+}
+
+impl From<String> for Error {
+    fn from(msg: String) -> Self {
+        Error::Other(msg)
+    }
+}
+
+impl From<&str> for Error {
+    fn from(msg: &str) -> Self {
+        Error::Other(msg.to_string())
+    }
+}