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/hg.py	Thu Aug 22 16:47:31 2019 -0700
+++ b/mercurial/hg.py	Sun Aug 18 00:45:33 2019 +0300
@@ -39,7 +39,6 @@
     node,
     phases,
     pycompat,
-    repository as repositorymod,
     scmutil,
     sshpeer,
     statichttprepo,
@@ -51,6 +50,10 @@
     vfs as vfsmod,
 )
 
+from .interfaces import (
+    repository as repositorymod,
+)
+
 release = lock.release
 
 # shared features