Display top categories as individual tabs

[bitbrain]

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Currently, all top categories are listed as folders inside a single Pandora view, however, in some cases it might involve a lot of scrolling and it creates visual noise. Introduce a setting where top categories are displayed as individual tabs, each having their own entities/subcategories in them on the left side.

New top categories could potentially be added via a + button where the tabs are (similar to VS Code adding new tabs/documents)

This setting should sit inside the Pandora project settings as a toggle (off by default)