feat(tui): more keybinds for scrolling (#10248)
### Description
See #8643
Page through terminal logs with `Shift + u` and `Shift + d`.
Jump to top or bottom of logs with `t` and `b`.
### Testing Instructions
Try it out!
Any tests I should add? I don't believe I see any existing tests for
logs scrolling, but can add some.
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Co-authored-by: Chris Olszewski <chris.olszewski@vercel.com>
