message: Update README.md - remove `T: Debug` from store traits
diff: @@ -86,13 +86,13 @@ features = ["alter-table", "index", "transaction", "metadata"]
  - [`Store & StoreMut`](https://github.com/gluesql/gluesql/blob/main/core/src/store/mod.rs)
  ```rust
  -pub trait Store<T: Debug> {
  +pub trait Store {
  async fn fetch_schema(..) -> ..;
  async fn fetch_data(..) -> ..;
  async fn scan_data(..) -> ..;
  }
  -pub trait StoreMut<T: Debug> where Self: Sized {
  +pub trait StoreMut where Self: Sized {
  async fn insert_schema(..) -> ..;
  async fn delete_schema(..) -> ..;
  async fn append_data(..) -> ..;
  @@ -113,11 +113,11 @@ pub trait AlterTable where Self: Sized {
  async fn drop_column(..) -> ..;
  }
  -pub trait Index<T: Debug> {
  +pub trait Index {
  async fn scan_indexed_data(..) -> ..;
  }
  -pub trait IndexMut<T: Debug> where Self: Sized {
  +pub trait IndexMut where Self: Sized {
  async fn create_index(..) -> ..;
  async fn drop_index(..) -> ..;
  }
  