[Tests/Catch] Added a IsNearlyEqualToVector custom matcher
[Tests/Catch] Added a IsNearlyEqualToVector custom matcher

- This performs a near-equality check on each values, and outputs a detailed error message if failed

- Changed matchers' streams' precision to digits10 + 2
  - +1 was apparently not enough, there could still be differences

Razakhel/RaZ,Razakhel/RaZ