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/CMakeLists.txt

@@ -415,10 +415,10 @@ add_test(NAME mkw_vr_first_person_tests COMMAND mkw_vr_first_person_tests)
 
 # The first-person cockpit (seated eye, wheel and handlebar geometry, level seat,
 # native wheel vertices) and hand steering (grab, turn, hand-off to the game),
-# ported from heurazy's mario-kart-wii-VR-port, and tracked hands (grasp, bare-hand
-# buttons, flick). All header-only.
+# ported from heurazy's mario-kart-wii-VR-port, tracked hands (grasp, bare-hand
+# buttons, flick) and throwing the held item. All header-only.
 foreach(test_name mkw_steering_wheel_tests mkw_vr_cockpit_tests mkw_vr_bullet_bill_tests mkw_vr_hand_steering_tests mkw_vr_camera_toggle_tests
-                  mkw_vr_hand_tracking_tests mkw_vr_culling_tests)
+                  mkw_vr_hand_tracking_tests mkw_vr_culling_tests mkw_vr_item_throw_tests)
     string(REGEX REPLACE "^mkw_" "" test_source "${test_name}")
     add_executable(${test_name} "${CMAKE_CURRENT_LIST_DIR}/tests/${test_source}.cpp")
     target_include_directories(${test_name} PRIVATE "${CMAKE_CURRENT_LIST_DIR}/include")