Add tests for mouse camera inversion settings in player start entities

tests/unit/entity-instances.test.ts

@@ -19,6 +19,7 @@ import {
   DEFAULT_PLAYER_START_CROUCH_SETTINGS,
   DEFAULT_PLAYER_START_EYE_HEIGHT,
   DEFAULT_PLAYER_START_ALLOW_LOOK_INPUT_TARGET_SWITCH,
+  DEFAULT_PLAYER_START_INVERT_MOUSE_CAMERA_HORIZONTAL,
   DEFAULT_PLAYER_START_INTERACTION_ANGLE_DEGREES,
   DEFAULT_PLAYER_START_INTERACTION_REACH_METERS,
   DEFAULT_PLAYER_START_JUMP_SETTINGS,
@@ -59,6 +60,8 @@ describe("entity registry defaults", () => {
         DEFAULT_PLAYER_START_ALLOW_LOOK_INPUT_TARGET_SWITCH,
       targetButtonCyclesActiveTarget:
         DEFAULT_PLAYER_START_TARGET_BUTTON_CYCLES_ACTIVE_TARGET,
+      invertMouseCameraHorizontal:
+        DEFAULT_PLAYER_START_INVERT_MOUSE_CAMERA_HORIZONTAL,
       movementTemplate: {
         kind: "default",
         moveSpeed: DEFAULT_PLAYER_START_MOVE_SPEED,