feat: read preload table to get path id

[StarHeartHunt]

battle_enm_pfb_18.ab.zip

for some assets in this assetbundle, container paths are defined in preload table

reference: https://github.com/Perfare/AssetStudio/blob/master/AssetStudioGUI/Studio.cs#L210

[K0lb3]

Thanks,
and sorry for the late response.

The PR looks good, except one little detail.
Currently the _build_container_index gets called all the time when accessing a container.
Doing so once when creating the ContainerHelper is a better solution.

[K0lb3]

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