feat: use vim.ui.select() as fallback if no fzf

feat: use upstream --preview implementation

refactor: avoid mutating $SHELL

fix: ensure posix compat for preview command

chore: add .editorconfig file

fix: normalize/escape path when changing directory

fix: silence missing autocmd error

feat: add `User ZoxideDirChanged` event

fix: extract directory

feat: provide default options for fzf

feat: introduce g:zoxide_fzf_options

docs: simplify README

refactor: shellescape() all command arguments

fix: ignore empty results in handle_select_result

docs: fix typo