Removed SDL_bool in favor of plain bool

We require stdbool.h in the build environment, so we might as well use the plain bool type.

If your environment doesn't have stdbool.h, this simple replacement will suffice:
typedef signed char bool;

include/SDL3/SDL_camera.h

@@ -369,14 +369,14 @@ extern SDL_DECLSPEC SDL_PropertiesID SDLCALL SDL_GetCameraProperties(SDL_Camera
  * be converting to this format behind the scenes.
  *
  * If the system is waiting for the user to approve access to the camera, as
- * some platforms require, this will return SDL_FALSE, but this isn't
+ * some platforms require, this will return false, but this isn't
  * necessarily a fatal error; you should either wait for an
  * SDL_EVENT_CAMERA_DEVICE_APPROVED (or SDL_EVENT_CAMERA_DEVICE_DENIED) event,
  * or poll SDL_IsCameraApproved() occasionally until it returns non-zero.
  *
  * \param camera opened camera device.
  * \param spec the SDL_CameraSpec to be initialized by this function.
- * \returns SDL_TRUE on success or SDL_FALSE on failure; call SDL_GetError()
+ * \returns true on success or false on failure; call SDL_GetError()
  *          for more information.
  *
  * \threadsafety It is safe to call this function from any thread.
@@ -385,7 +385,7 @@ extern SDL_DECLSPEC SDL_PropertiesID SDLCALL SDL_GetCameraProperties(SDL_Camera
  *
  * \sa SDL_OpenCamera
  */
-extern SDL_DECLSPEC SDL_bool SDLCALL SDL_GetCameraFormat(SDL_Camera *camera, SDL_CameraSpec *spec);
+extern SDL_DECLSPEC bool SDLCALL SDL_GetCameraFormat(SDL_Camera *camera, SDL_CameraSpec *spec);
 
 /**
  * Acquire a frame.