refactor(PositionalAudio.vue): remove duplicate audio buffer state declaration

- Eliminated the redundant declaration of the audio buffer state by consolidating it into a single instance using `useLoader`. This change enhances code clarity and maintains best practices for state management in Vue components.

Author: alvarosabu

src/core/abstractions/PositionalAudio.vue

@@ -36,6 +36,8 @@ const emit = defineEmits(['isPlaying'])
 
 const { ready, url, distance, helper, loop, autoplay, innerAngle, outerAngle, outerGain } = toRefs(props)
 
+const { state: buffer } = useLoader<AudioBuffer | AudioBuffer[]>(AudioLoader, url.value)
+
 const { camera } = useTresContext()
 
 const positionalAudioRef = shallowRef<PositionalAudio | null>(null)
@@ -132,8 +134,6 @@ defineExpose({
   dispose,
 })
 
-const { state: buffer } = useLoader<AudioBuffer | AudioBuffer[]>(AudioLoader, url.value)
-
 watch(positionalAudioRef, () => {
   if (!positionalAudioRef?.value) { return }