commands: create a "mercurial.cmd_impls" module to host graft The "mercurial.commands" have been overweight for a while. We create a namespace dedicated to host smaller modules containing code revelant to a specific command. This should result in more isolated snd manageable module. We start with moving the code for "hg graft" in "mercurial.cmd_impls.graft" before doing more work on it. Since that code was about 5% of "commands.py" this seems like a success.

--- a/setup.py	Wed Nov 27 22:09:37 2024 -0500
+++ b/setup.py	Tue Nov 19 15:46:12 2024 +0100
@@ -1358,6 +1358,7 @@
     'mercurial.admin',
     'mercurial.cext',
     'mercurial.cffi',
+    'mercurial.cmd_impls',
     'mercurial.branching',
     'mercurial.defaultrc',
     'mercurial.dirstateutils',