refactor errors / isolate core/http errors

meilisearch-schema/src/error.rs

@@ -1,6 +1,7 @@
-
 use std::{error, fmt};
 
+use meilisearch_error::{ErrorCode, Code};
+
 pub type SResult<T> = Result<T, Error>;
 
 #[derive(Debug)]
@@ -22,3 +23,9 @@ impl fmt::Display for Error {
 }
 
 impl error::Error for Error {}
+
+impl ErrorCode for Error {
+    fn error_code(&self) -> Code {
+        unimplemented!()
+    }
+}