Support page up/down keybindings for scrolling Terminal

[tekumara]

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Describe the feature

Support page up/down keybindings for moving up/down in the Terminal scrollback.

If applicable, add mockups / screenshots to help present your vision of the feature

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[chuck-alt-delete]

I can get this functionality using fn+up/down.

What I would like though is the ability to scroll up and down with the trackpad. I have this in vs code, but I don't remember if this is something I had to enable in a special way