Add SQUALL few-shot testing script (Codex)

[haileyschoelkopf]

modifying Spider few-shot script to have a version working with SQUALL.

Current issue with preprocessing script for SQUALL:

• in process_squall_example function, original_col_name_dict is not a defined variable. I'm assuming the reason it doesn't work is because this fn was refactored into process_squall_example and build_column_name_dict (where original_col_name_dict variable is defined) but not sure what to change this to in process_squall_example, still looking.

[haileyschoelkopf]

Modified squall preprocessing. Now getting many "no such column" errors, followed by an eventual

sqlite3.ProgrammingError: Incorrect number of bindings supplied. The current statement uses 2, and there are 0 supplied

error message.