Numeric expressions in controller mapping JSON

[ada-tv]

Controller mapping JSONs (ie openxr.json, openvr.json) currently can't express numeric expressions, only boolean ones. This actually caused a few problems in the past I had to fix by removing the bad checks*, and it currently makes expressions like this impossible:

if (
  !OpenXR.LeftHasPrimary &&
  OpenXR.LeftTrackpadX > -0.4 &&
  OpenXR.LeftTrackpadX < 0.4
) {
  Standard.LeftPrimaryThumb = OpenXR.LeftTrackpadPress
}

---

*Where a controller axis was false <= 0 and true > 0, which made weird direction-specific control bugs, and was probably intended to have an abs in there somewhere but never got one