style(pydispatch): Sort and group imports

Uses a combination of `ruff check --output-format=concise --select I --fix 'python/grass'`, `isort --profile=black python/grass` and `black .`

python/grass/pydispatch/dispatcher.py

@@ -27,7 +27,8 @@
 """
 
 import weakref
-from grass.pydispatch import saferef, robustapply, errors
+
+from grass.pydispatch import errors, robustapply, saferef
 
 __author__ = "Patrick K. O'Brien <[email protected]>"
 __cvsid__ = "Id: dispatcher.py,v 1.1 2010/03/30 15:45:55 mcfletch Exp"

python/grass/pydispatch/robust.py

@@ -1,6 +1,6 @@
 """Module implementing error-catching version of send (sendRobust)"""
 
-from grass.pydispatch.dispatcher import Any, Anonymous, liveReceivers, getAllReceivers
+from grass.pydispatch.dispatcher import Anonymous, Any, getAllReceivers, liveReceivers
 from grass.pydispatch.robustapply import robustApply
 
 

python/grass/pydispatch/saferef.py

@@ -1,8 +1,8 @@
 """Refactored "safe reference" from dispatcher.py"""
 
-import weakref
-import traceback
 import sys
+import traceback
+import weakref
 
 im_func = "__func__"
 im_self = "__self__"