fix: reduce templates to country, region & county for mvp

Lowercase subtype names, fix question type hints

Fix: No pairs are created for mixed queries

enh: Add templates to handle queries like subregion, region

fix: mixed templates are not generated because of stale parquet files

Add a couple of more sql templates for natural earth & chained queries

Add finetune instructions for gemma

FEAT: Add to create SLM training data