Add an overview of how to handle temporary memory

include/SDL3/SDL_events.h

@@ -1443,6 +1443,16 @@ extern SDL_DECLSPEC void * SDLCALL SDL_AllocateTemporaryMemory(size_t size);
  * will return NULL, and the application does not have ownership of the
  * memory.
  *
+ * Essentially you have 3 options for handling temporary memory:
+ *
+ * 1. After calling a function that returns temporary memory, pass that pointer to SDL_FreeTemporaryMemory(). This gives you full control over the management of allocations.
+ *
+ * 2. On your main thread, temporary memory is automatically cleaned up when processing events. On other threads, you can periodically call SDL_FreeTemporaryMemory(NULL) to clean up any temporary memory that has accumulated.
+ *
+ * 3. After calling a function that returns temporary memory, pass that pointer to SDL_ClaimTemporaryMemory(). This transfers ownership of the memory to your application and you can pass it to other threads or save it indefinitely, calling SDL_free() to free it when you're ready.
+ *
+ * Any of the three options are valid, and you can mix and match them to suit your application.
+ *
  * \param mem a pointer allocated with SDL_AllocateTemporaryMemory().
  * \returns a pointer to the memory now owned by the application, which must
  *          be freed using SDL_free(), or NULL if the memory is not temporary