fix(PlanarControls): fix rounding issues with max and min resolution

[mgermerie]

Description

Fix some rounding issues concerning minResolution and maxResolution parameters. due to some incorrect rounding, the user could be unable to zoom out to reach a resolution equals to the minResolution parameter (or to zoom in to reach a resolution equals to the maxResolution parameter).

To fix this, the following is done :

• The resolution values are all rounded up to 10 to the minus sixth meters.
• The maxResolution (which is the minimal value the resolution must take) is rounded bellow.
• The minResolution (which is the maximal value the resolution must take) is rounded above.
• The current view resolution is rounded bellow or above depending if it is compared to maxResolution or minResolution.

Motivation and Context

Closes #1659.

Left to do

• [ ] When zooming in or out in a PlanarView with a PerspectiveCamera, the distance traveled does not strictly matches the value implied by the zoomFactor parameter. This imprecision causes the same issue as mentioned in #1659.

[gchoqueux]

@mgermerie could you refresh this PR?