I'm not sure if vim-pencil addresses this, but I find writing in the online typst editor to be a delight, particularly its soft-wrap mode and its auto-indent.

Even though I have a very narrow editor when you type for example:

    this is a very very long sentence
      - this is a very incredibly long sentence too

    this is a very very
    long sentence
      - this is a very
        incredibly long
        sentence too