This adds the following navigation helpers on macOS:

Alt+LeftArrow / Alt+RightArrow - Jump to previous / next word in the
input.
Control+Alt+B / Control+Alt+F - Jump to previous / next word in the
input.
CMD+LeftArrow / CMD+RightArrow - Jump to beginning / end of the input.
Control+A / Control+E - Jump to the beginning / end of the
input.

It also respects shift when using these shortcuts to make a selection.