Branch vim windows install

[kaizhu256]

Fixes #455 .

• vim - Allow installing vim-plugin to any directory, instead of hardcoded to ~/.vim/.

This PR will allow you to install vim-plugin to custom-directory, e.g:
- save jslint.mjs, jslint_wrapper_vim.vim to directory ~/vimfiles/
- vim-command :source ~/vimfiles/jslint_wrapper_vim.vim

Additionally, this PR will:

• ci - Update github-ci for actions/cache, actions/setup-python from nodejs v16 to nodejs v20.
• ci - Update shell-function shRollupFetch() to fix blank date-committed.
• ci - bugfix - Fix google-chrome unable to create screenshot because user-data-dir is /dev/null.