Rename bootstrap directory

Renamed bootstrap directory to _bootstrap to conform to default ignore
pattern of autostow.sh, and make it visually clear that this is a
special directory, not one used for the dotfiles itself.

_bootstrap/packages.csv

@@ -0,0 +1,122 @@
+alacritty
+atool
+anki
+bash
+bibtool
+bison
+bzip2
+dhcpcd
+dialog
+docker
+dunst
+exa
+fasd
+feh
+flashfocus-git
+fzf
+gawk
+git
+git-lfs
+glow
+gnome-keyring
+gopass
+grep
+gzip
+haveged
+htop
+hugo
+i3-gaps
+i3lock
+jabref-latest
+jpdftweak
+keybase-bin
+less
+libnotify
+libtool
+littler
+logrotate
+lynx
+mosh
+mpv
+nano
+neovim
+nerd-fonts-fira-code
+nerd-fonts-iosevka
+nextcloud-client
+ntfs-3g
+ntp
+openssh
+os-prober
+pacman
+pandoc
+pandoc-citeproc
+picom
+playerctl
+polybar
+powertop
+pulseaudio
+pulseaudio-alsa
+pulsemixer
+python-pip
+python-pybtex
+python-pynvim
+qutebrowser
+r
+redshift
+ripgrep
+rng-tools
+rofi
+rofi-calc
+rofi-dmenu
+rofi-greenclip
+rofimoji
+rtv
+scrot
+sed
+sshfs
+stow
+surfraw
+sxhkd
+tar
+texinfo
+texlive-bibtexextra
+texlive-core
+texlive-fontsextra
+texlive-formatsextra
+texlive-games
+texlive-humanities
+texlive-latexextra
+texlive-music
+texlive-pictures
+texlive-pstricks
+texlive-publishers
+texlive-science
+tmux
+tomb
+topgrade
+ttf-comic-neue
+ttf-heuristica
+ttf-signika
+unclutter
+unrar
+unzip
+vagrant
+vifm
+virtualbox
+wget
+which
+xcape
+xclip
+xdg-user-dirs
+xdotool
+xorg-server
+xorg-xev
+xorg-xinit
+xorg-xinput
+xorg-xrandr
+yarn
+yay
+youtube-dl
+zathura
+zathura-pdf-mupdf
+zsh