Import sl benchmark project

[joellabes]

Bring the semantic layer benchmark project from https://roundup.getdbt.com/p/semantic-layer-as-the-data-interface into ADE-bench.

• Fuzzy matching of result tables
• Every task is split into its own directory so there's a lot of boilerplate, but I decided that was worth it. The alternative was to have a single file which contained all the tasks and gold queries, but that would remove flexibility if we want to modify the project during setup (e.g. to remove the existing semantic models and have the agent recreate them).
• New source database so we'll have to add that to the shared google drive :/ acme_insurance.duckdb.zip