Proposal - store metadata inside `internal.db` tables about datasette HOT 2 OPEN

@hookimpl
async def startup(datasette):
   # Update a single key with the Python API
    await datasette.set_instance_metadata("title", "My cool Datasette project")

    # bulk updates if you want more control
    await datasette.get_internal_database().execute_write(
        """
            UPDATE datasette_metadata_database_entries
            SET value = 'database description for the covid database'
            WHERE database_name = 'covid'
              AND key = 'description'
        """
    )