Re-organise to use a bare repo

Re-organise to use a bare repo, e.g.
https://www.atlassian.com/git/tutorials/dotfiles.

.zsh/configs/git.zsh

@@ -0,0 +1,10 @@
+# No arguments: `git status`
+# With arguments: acts like `git`
+g() {
+  if [[ $# > 0 ]];
+  then
+    git $@
+  else
+    git status --short --branch
+  fi
+}