Calculate zoom from pixel resolution or scale denominator

[navispatial]

Currently commented out in TileMatrixSet as use and test cases need to analyzed first:

  /// The maximum scaledown zoom with the pixel size closest to [resolution].
  int zoomForPixelResolution(double resolution);

  /// The maximum scaledown zoom with the scale closest to 1 : [denominator].
  int zoomForScaleDenominator(double denominator);