Add item throwing mechanics to VR configuration and input handling

- Introduced `vrCockpitItemThrow` configuration option to enable throwing items in VR.
- Implemented `ThrowDetector` and `ThrowSequence` classes to manage item throwing mechanics based on hand movements.
- Updated `OpenXRInput` to handle item throwing based on hand swings, integrating with existing VR input systems.
- Enhanced settings overlay to allow users to toggle item throwing functionality.
- Added tests for item throwing mechanics, ensuring correct behavior for various hand movements and conditions.

runtime/tests/vr_config_tests.cpp

@@ -22,6 +22,10 @@ int main() {
     Require(std::string_view(RuntimeConfigFile::kVrCockpitItemHandDefault) == "left");
     Require(!Parse("[vr]\n").vrCockpitItemHand.has_value());
     Require(!Parse("[vr]\ncockpit_item_hand = 1\n").vrCockpitItemHand.has_value());
+    Require(RuntimeConfigFile::kVrCockpitItemThrowDefault);
+    Require(Parse("[vr]\ncockpit_item_throw = false\n").vrCockpitItemThrow == false);
+    Require(Parse("[vr]\ncockpit_item_throw = true\n").vrCockpitItemThrow == true);
+    Require(!Parse("[vr]\n").vrCockpitItemThrow.has_value());
     // [vr] foveation: the Quest's foveated rendering level, index-matched to
     // aurora_set_stereo_foveation.
     for (std::string_view level : RuntimeConfigFile::kVrFoveationLevels) {