add a tonic attibutes

this might be used by tonic to set some settings, maybe it is not needed and could be done via UI.

.tonicattributes

@@ -0,0 +1,6 @@
+issue: to_mainrepository
+wiki: to_mainrepository
+Basic_Settings_private: true
+Basic_Settings_listed: true
+Collaboration: 
+    - parent_team