Godot 4.2.2 How to Read PCK Data

Godot Version 4.2.2

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Question

I packed some AnimatedSprite2D nodes into a .pck file, and I want to read it in the main program because my AnimatedSprite2D is quite large and the data filled in are frame animations, which are about 30-50MB in size. How can I read and process this .pck file?