Add workspace creation from Penumbra mod.

[lumxiv]

• Use case; I want to edit a Penumbra mod but I don't have an existing workspace. I want to append an existing Penumbra mod to my workspace

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• I can select by file extension or all of them, the more common file types are pre-selected. All VFXEditor editable files selectable.

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• I can select by modpack option or all of them. Replaced path can end up being duplicate, user be wary.

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