Components with textures shouldn't require `<Suspense>`

Description

As a dev using Cientos, I don't want to have to wrap components in <Suspense> just because they use a texture internally.

Suggested solution

I suggest we provide a function like useTexture, but one that:

• returns a ref (or refs) whose initial value is a 1-pixel transparent DataTexture
• updates the ref once the image is loaded

This will allow us to avoid awaiting in setup code.

Alternative

Alternatively, we could keep the current useTexture and provide a separate useEmptyTexture to be used like

const t:Ref<Texture> = useEmptyTexture()
useTexture({map:'example.org/texture.png'}).then((obj) => t.value = obj.map)

watch(t, () => { /* do something */ })

Additional context

I'm adding a texture prop to <Sparkles /> and I don't want to force users to wrap the component in a <Suspense />.

I looked for established patterns and found that <Smoke /> loads textures, but requires <Suspense />. I think we can improve the DX by removing that requirement for users and providing a standard-ish way for components to avoid awaiting.

Validations

• I agree to follow this project's Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.