Add mx-puppet-twitter

Signed-off-by: Tulir Asokan <tulir@maunium.net>

roles/matrix-bridge-mx-puppet-twitter/tasks/validate_config.yml

@@ -0,0 +1,10 @@
+---
+
+- name: Fail if required settings not defined
+  fail:
+    msg: >-
+      You need to define a required configuration setting (`{{ item }}`).
+  when: "vars[item] == ''"
+  with_items:
+    - "matrix_mx_puppet_twitter_appservice_token"
+    - "matrix_mx_puppet_twitter_homeserver_token"