Add flag --fail-on-regression

Add tag to fail CI suites when code has performance regression greater then a pre established treshold 👍 

Should be something like:
`
oracletrace mycode.py --json new_json.json --compare default_json.json --fail-on-regression 0.5
` 
example with 50% of treshold 😀 

Trust in you @AndreXP1 