interfaces: create a new folder for interfaces and move repository.py in it I was trying to understand current interfaces and write new ones and I realized we need to improve how current interfaces are organised. This creates a dedicated folder for defining interfaces and move `repository.py` which defines all the current interfaces inside it. Differential Revision: https://phab.mercurial-scm.org/D6741

--- a/mercurial/narrowspec.py	Thu Aug 22 16:47:31 2019 -0700
+++ b/mercurial/narrowspec.py	Sun Aug 18 00:45:33 2019 +0300
@@ -8,11 +8,13 @@
 from __future__ import absolute_import
 
 from .i18n import _
+from .interfaces import (
+    repository,
+)
 from . import (
     error,
     match as matchmod,
     merge,
-    repository,
     scmutil,
     sparse,
     util,