Actually add sandbox plugin

.conduit.yaml

@@ -6,8 +6,7 @@
 - brew:
     - zsh
 - command:
-    - 
-      install: sudo chsh $USER -s `which zsh`
+    - install: sudo chsh $USER -s `which zsh`
       remove: sudo chsh $USER -s `which bash`
 - symlink:
     - {src: zlogin, dst: ~/.zlogin}
@@ -15,9 +14,10 @@
     - {src: zprofile, dst: ~/.zprofile}
     - {src: zshenv, dst: ~/.zshenv}
     - {src: zshrc, dst: ~/.zshrc}
-    - 
-      src: prompt_fresh_setup
+    - src: prompt_fresh_setup
       dst: ~/.local/share/zsh/site-functions/prompt_fresh_setup
+    - src: sandbox/_sandbox
+      dst: ~/.local/share/zsh/site-functions/_sandbox
 - repo:
     - https://github.com/zsh-users/zsh-autosuggestions.git
     - https://github.com/zsh-users/zsh-history-substring-search.git