Merge vi-mode.plugin.zsh from upstream
ffind: handle options for find
zshenv: setup pyenv
zshenv: setup PATH for pipsi, fix order
zshrc: use vi-mode plugin
theme: improve display of repo/commit in rprompt
zsh: use vi bindings, bind insert-last-assignment/insert-last-word
theme: fix RPS1: space at end, no vi_mode_prompt_info
theme: keymap indicator (vicmd/viins)
termsupport: improve title handling with tmux and last command