added clone of the agnoster theme for omf

ansible/roles/fish/tasks/main.yml

@@ -26,6 +26,10 @@
     depth: 1
     single_branch: true
     update: true
+- name: Clone Agnoster theme
+  git:
+    repo: https://github.com/oh-my-fish/theme-agnoster
+    dest: /$HOME/.local/share/omf/themes/agnoster
     depth: 1
     single_branch: true
     update: true