add zsh completion setup

zsh/.zshenv

@@ -1,3 +1,22 @@
-. "$HOME/.cargo/env"
+export EDITOR="nvim"
+export VISUAL="nvim"
 
-if [ -f ~/.zshrc ]; then . ~/.zshrc; fi
+export HISTFILE=~/.zsh_history
+export HISTSIZE=5000000
+export SAVEHIST=$HISTSIZE
+
+export CLICOLOR=1
+
+export DOTFILES="$HOME/dotfiles"
+
+# colored GCC warnings and errors
+export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'
+
+# Man pages
+export MANPAGER='nvim +Man!'
+
+export SSH_ENV="$HOME/.ssh/agent-environment"
+
+export PATH=~/.local/bin:$PATH
+
+. "$HOME/.cargo/env"