Add pause functionality validation in scene document

src/app/App.tsx

@@ -239,6 +239,7 @@ import {
   PLAYER_START_GAMEPAD_BINDINGS,
   PLAYER_START_LOCOMOTION_ACTIONS,
   PLAYER_START_MOVEMENT_ACTIONS,
+  PLAYER_START_SYSTEM_ACTIONS,
   PLAYER_START_NAVIGATION_MODES,
   DEFAULT_SPOT_LIGHT_ANGLE_DEGREES,
   DEFAULT_SPOT_LIGHT_COLOR_HEX,
@@ -279,6 +280,7 @@ import {
   type PlayerStartKeyboardBindingCode,
   type PlayerStartLocomotionAction,
   type PlayerStartMovementAction,
+  type PlayerStartSystemAction,
   type PlayerStartMovementTemplate,
   type PlayerStartNavigationMode,
   type EntityInstance,
@@ -543,6 +545,8 @@ function getPlayerStartInputActionLabel(
       return "Sprint";
     case "crouch":
       return "Crouch";
+    case "pauseTime":
+      return "Pause";
   }
 }
 
@@ -616,6 +620,8 @@ function formatPlayerStartGamepadActionBindingLabel(
       return "West Button";
     case "buttonNorth":
       return "North Button";
+    case "buttonMenu":
+      return "Menu / Start";
     case "leftShoulder":
       return "Left Shoulder";
     case "rightShoulder":

src/document/scene-document-validation.ts

@@ -2024,6 +2024,19 @@ function validatePlayerStartEntity(
     );
   }
 
+  if (
+    !isPlayerStartKeyboardBindingCode(entity.inputBindings?.keyboard.pauseTime)
+  ) {
+    diagnostics.push(
+      createDiagnostic(
+        "error",
+        "invalid-player-start-pause-keyboard-binding",
+        "Player Start pause keyboard binding must be a supported key code.",
+        `${path}.inputBindings.keyboard.pauseTime`
+      )
+    );
+  }
+
   if (!isPlayerStartGamepadBinding(entity.inputBindings?.gamepad.moveForward)) {
     diagnostics.push(
       createDiagnostic(
@@ -2107,6 +2120,19 @@ function validatePlayerStartEntity(
     );
   }
 
+  if (
+    !isPlayerStartGamepadActionBinding(entity.inputBindings?.gamepad.pauseTime)
+  ) {
+    diagnostics.push(
+      createDiagnostic(
+        "error",
+        "invalid-player-start-pause-gamepad-binding",
+        "Player Start pause gamepad binding must be a supported standard-gamepad action input.",
+        `${path}.inputBindings.gamepad.pauseTime`
+      )
+    );
+  }
+
   if (
     !isPlayerStartGamepadCameraLookBinding(
       entity.inputBindings?.gamepad.cameraLook