Improvement: Clean up Peter

This MR aims to vastly clean up overall code quality of Peter by

• Separating concerns where appropriate
  • Big one here is separating the logic behind test logs and test runs
• Updating the docs (both README, -h page, and various JS docs)
• Reducing # functions by removing redundant methods and creating shared methods across drivers
  • This also ties to the separation of concerns between test logging and running
  • Ex. Test timeout logic was scattered across each driver, this has been converted to a shared function that all drivers can use
• Re-implementing --version/-V option
• Decreasing # of variables and combining into objects where appropriate
• Removing various redundant checks scattered throughout the codebase
  • Ex. Removing multiple similar checks like knownFailingTest = testFile.endsWith('.failing');
  • Instead, check and set this once, and then re-use the same variables. Don't keep doing the same checks over and over
• Increased readability in some areas