feat: add machineClass and ssh config

run_onchange_before_11_zsh.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+if ! type zsh > /dev/null; then
+    echo "Cannnot change default shell to zsh: not installed"
+else
+    # Make ZSH the default shell environment
+    if [ $(cat /etc/passwd | grep $USER | awk -F ':' '{print substr($7, length($7)-3)}') != "/zsh" ]; then
+        echo "Changing shell to zsh."
+        chsh -s $(which zsh)
+    else
+        echo "Shell is already zsh."
+    fi
+
+    # Antidote Installation
+    if [ ! -d "$HOME/.antidote" ]; then
+        echo "Installing Antidote"
+
+        # make sure git is installed
+        if ! type git > /dev/null; then
+            echo "Git not installed. Cannot install antidote"
+	else
+             git clone --depth=1 https://github.com/mattmc3/antidote.git $HOME/.antidote
+        fi
+
+    else
+	echo "Antidote already exists."
+    fi
+    
+fi