zsh: Move stuff around

Move all environment variables that do not relate directly to zsh but
(in most cases) enforce the XDG Base Directory specification to
zprofile.
This way they are just exported once on login and not every time the
shell starts again.

Move the lines in zshenv that are not directly responsible for moving
the zsh files into $XDG_CONFIG_HOME to their own zshenv there.

.config/zsh/.zshrc

@@ -144,41 +144,6 @@ comp-source "$ZSH_CONF/keys.zsh"
 # Reenable fzf-tab since `bindkey -v` seems to deactivate it
 enable-fzf-tab
 
-## Setup PATH
-[[ "$PATH" =~ "$HOME/\.local/bin" ]] || export PATH="$HOME/.local/bin${PATH:+:$PATH}"
-
-## Env variables that have nothing to do with zsh
-if command -v nvim >/dev/null 2>&1; then
-	export EDITOR=nvim
-elif command -v vim >/dev/null 2>&1; then
-	export EDITOR=vim
-elif command -v nano >/dev/null 2>&1; then
-	export EDITOR=nano
-fi
-
-if command -v nvim >/dev/null 2>&1; then
-	export MANPAGER="nvim -c 'set ft=man' -"
-else
-	# https://www.tecmint.com/view-colored-man-pages-in-linux/
-	export LESS_TERMCAP_mb=$'\e[1;32m'
-	export LESS_TERMCAP_md=$'\e[1;32m'
-	export LESS_TERMCAP_me=$'\e[0m'
-	export LESS_TERMCAP_se=$'\e[0m'
-	export LESS_TERMCAP_so=$'\E[01;44;33m'
-	export LESS_TERMCAP_ue=$'\e[0m'
-	export LESS_TERMCAP_us=$'\e[1;4;31m'
-fi
-
-## Less clutter in $HOME by enforcing the XDG base directory standard
-export ATOM_HOME="${XDG_DATA_HOME:-$HOME/.local/share}/atom"
-export GOPATH="${XDG_DATA_HOME:-$HOME/.local/share}/go"
-export SQLITE_HISTORY="${XDG_DATA_HOME:-$HOME/.local/share}/sqlite3/sqlite_history"
-# No less history file
-export LESSHISTFILE=-
-
-export ANDROID_SDK_HOME="${XDG_CONFIG_HOME:-$HOME/.config}/android"
-export VIMINIT="let \$MYVIMRC=\"${XDG_CONFIG_HOME:-$HOME/.config}/vim/xdg.vim\" | source \$MYVIMRC"
-
 ## Setup zle
 zle_highlight=('paste:none')