Remove unnecessary Generator debug output.
Rename sorting.cpp to uppercase.
Refactor the generator into a generator class.
Define the bucket type as bucket_t.
Add a Chunk class for handling buckets.
Implement bucket merging in lsql::Sorting
Update error messages.
Fix const modifiers in the generator class.
Adapt the main test scenario.
Refactor *_t typedefs to PascalCase.