feat(sql): preserve column order from query with indexmap

[thewh1teagle]

When using the select command in the sql plugin, the field order in each row isn't maintained due to the use of a hashmap. This update ensures that the field order remains consistent.

Example:

SELECT name, age FROM users;

Previously, the returned rows could have inconsistent order, such as

{"name": ..., "age": ...}

or

{"age": ..., "name": ...}

With this modification, the order will consistently follow the query, i.e., name followed by age.

[FabianLars]

Thanks for contributing! can you also add a changefile in .changes/ please?

[thewh1teagle]

Sure, added new changes file