feat(org/permissions): Add org permission constants (#7)

Author: gagantrivedi

common/organisations/permissions.py

@@ -0,0 +1,10 @@
+CREATE_PROJECT = "CREATE_PROJECT"
+MANAGE_USER_GROUPS = "MANAGE_USER_GROUPS"
+
+ORGANISATION_PERMISSIONS = (
+    (CREATE_PROJECT, "Allows the user to create projects in this organisation."),
+    (
+        MANAGE_USER_GROUPS,
+        "Allows the user to manage the groups in the organisation and their members.",
+    ),
+)