feat(revamp): add zsh and neovim configs, add an install script and a dependencies list

system/zshenv

@@ -0,0 +1,9 @@
+if [[ -z "$XDG_CONFIG_HOME" ]]
+then
+        export XDG_CONFIG_HOME="$HOME/.config/"
+fi
+
+if [[ -d "$XDG_CONFIG_HOME/zsh" ]]
+then
+        export ZDOTDIR="$XDG_CONFIG_HOME/zsh/"
+fi