Pointer and marker should probably be different colors

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With the default fzf colors, both pointer and marker are red, but the marker is a lighter shade. This makes them easy to differentiate

The Catppuccin theme makes them both the exact same color (e.g. #f5e0dc in Catppuccin Mocha), which is not so great because the pointer and marker appear beside each other in the TUI.

In fzf 0.53.0, the default pointer and marker characters were changed to Unicode bar characters, which makes the problem worse (the default pointer character used to be >).

To demonstrate a more extreme example, I set both pointer and marker characters to the same Unicode bar character.

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Testing some different colors for the marker with Catppuccin Mocha:

Replacing Rosewater (#f5e0dc) with Lavender (#b4befe):

Doesn't feel like the contrast is enough

Replacing Rosewater (#f5e0dc) with Blue (#89b4fa):

Definitely better now