add autocomplete support for zsh and fish shells

[mjurbanski-reef]

No description provided.

[emnoor-reef]

The first time triggering the autocomplete just prints with completion options. On the second time the auto completion can be selected. The printed options from the first time stays in the shell scrollback buffer, which doesn't usually happen on zsh.
IDK, if it is a argcomplete bug or not.

Screen.Recording.2024-03-28.at.9.31.46.PM.mov

[emnoor-reef]

Something similar happens on fish. The autocomplete selection actually starts on send Tab. But the options are not left in scrollback buffer like zsh. Not a fish user, so IDK if this behaviour is expected.

Screen.Recording.2024-03-28.at.9.40.27.PM.mov

[mjurbanski-reef]

The first time triggering the autocomplete just prints with completion options. On the second time the auto completion can be selected. The printed options from the first time stays in the shell scrollback buffer, which doesn't usually happen on zsh. IDK, if it is a argcomplete bug or not.

Screen.Recording.2024-03-28.at.9.31.46.PM.mov

this behavior is due to the sheer number of completions suggested as far as I can tell - I can reproduce it using by trying to complete git -

[emnoor-reef]

If you have too many suggestions, zsh prompts you if you want to see them or not:

zsh: do you wish to see all 155 possibilities (155 lines)?

For b2 it doesn't happen.

[mjurbanski-reef]

thats weird, it does prompt me