Sql-runner

- Streamline dependencies (remove superfluous version restrictions and redundant dependencies)
- Update documentation

- Return "legacy" CLI entry point `sqlrunner` which is the same as `runner`

- Fix bugs with view creation on Snowflake / RedShift / Postgresql (`DROP TABLE IF EXISTS`)
- Update snowflake connector
- Separate snowflake from Azure BLOB
- Add Azure BLOB as an optional dependency

- Add data testing feature

- Dependency-aware ordered statement execution

- Add interactive runner `run_sql path/to/config.json`