migrate to sync dep (#1)

Add early stopping for debugging on passed tests. Propagate minor changes to default human_message keys.

Fix bugs, clean code, bring everything up-to-date and standardize a bit more.

Add an abstract CodeTesting Flow and working CF_CodeTesting Flow.

Bring CF flows up-to-date with library.

Update name of expected_inputs/outputs variables.

Update Flow name.

Add all CF flow modulo the ones that require debugging.