reintroduce zshenv

zsh/.zshenv

@@ -0,0 +1,14 @@
+HISTFILE=${HOME}/.zsh_history
+HISTSIZE=500000
+SAVEHIST=$HISTSIZE
+
+export GOPATH="$HOME/.go"
+export PATH="$HOME/.cargo/bin:$HOME/.gem/bin:$GOPATH/bin:$HOME/.local/bin:$PATH"
+
+if [[ -x /usr/bin/nvim ]]; then
+    export EDITOR=nvim
+elif [[ -x /usr/bin/vim ]]; then
+    export EDITOR=vim
+fi
+
+[[ -x /usr/bin/dircolors ]] && eval "$(dircolors)"