refactor(pm): create new crate for payment methods (#7355)

Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>

crates/hyperswitch_domain_models/src/errors.rs

@@ -39,3 +39,13 @@ pub enum StorageError {
     #[error("RedisError: {0:?}")]
     RedisError(String),
 }
+
+impl StorageError {
+    pub fn is_db_not_found(&self) -> bool {
+        match self {
+            Self::DatabaseError(err) => matches!(err.current_context(), DatabaseError::NotFound),
+            Self::ValueNotFound(_) => true,
+            _ => false,
+        }
+    }
+}