feat: optional vim-mode in prompt input (dmtrKovalenko#384)

* feat: enable vim-mode

* feat: handle cursor move to move up until prefix

* feat: make it configurable

* docs: vim_mode

* docs: update to prompt_vim_mode

Co-authored-by: Dmitriy Kovalenko <dmitriy@iusevimbtw.com>

* refactor: rename vim_mode to prompt_vim_mode

Matches the maintainer's preferred naming from PR review: since this is a
neovim plugin, the flag scope is clarified by the prompt_ prefix.

* style: collapse single-statement if for stylua

---------

Co-authored-by: Dmitriy Kovalenko <dmitriy@iusevimbtw.com>

fix: Perfromance regression (dmtrKovalenko#376)

* fix: Perfromance regression

* chore: Update docs for - fix: Perfromance regression

feat: create new qflist instead of replacing (dmtrKovalenko#377)

feat: create new qflist instead of replacing (dmtrKovalenko#377)

fix: Perfromance regression (dmtrKovalenko#376)

* fix: Perfromance regression

* chore: Update docs for - fix: Perfromance regression

feat: create new qflist instead of replacing (dmtrKovalenko#377)

feat: create new qflist instead of replacing (dmtrKovalenko#377)

feat: create new qflist instead of replacing (dmtrKovalenko#377)

fix: Unicode segmentation crash (dmtrKovalenko#373)

* fix: Unicode segmentation crash

closes dmtrKovalenko#369

* chore: Update docs for - fix: Unicode segmentation crash

feat: Correct bonuses for actual path prefix (dmtrKovalenko#372)

* feat: Correct bonuses for actual path prefix

The issue is related to the fact that long prefix similarity the suffix
difference got neglected as a small typo which is wrong

* chore: Update docs for - feat: Correct bonuses for actual path prefix