Better spellbook debugging

After pushing to spellbook, when a dbt test fails, show results or give a link to results. Example: 1) "Result failed as 0 rows expected but following 10 exist: col 1 | col 2 | ... ---------------- 12 | abcd | ... 2) Result failed as 0 rows expected but 10 exist. See temporary tables at run_1234232323232.my_spell