StorageTextureNode: Tighten types & add store function

[thelazylamaGit]

Modifies StorageTextureNode.d.ts to type value as StorageTexture instead of Texture to better match the three.js definitions and also adds new type declaration for .store() function added in this PR mrdoob/three.js#33544

[thelazylamaGit]

test-examples seems to be failing because its inferring the js Fn(({ storageTexture }) => ...) as Texture, not StorageTexture.

StorageTexture | StorageTextureNode better matches the JSDoc & should be more accurate here, but Texture | StorageTextureNode avoids this inference error and should still work anyways. I'll leave choice up to whatever maintainer thinks is better.

[Methuselah96]

Thanks!