Cleanup: move 'console' module to 'bl_console_utils.autocomplete'

The name 'console' for a module was too generic, move into a sub-package
of bl_console_utils, so other console utilities can be added
without creating new top-level modules.

release/scripts/modules/console_python.py

@@ -213,7 +213,7 @@ execute.hooks = []
 
 
 def autocomplete(context):
-    from console import intellisense
+    from bl_console_utils.autocomplete import intellisense
 
     sc = context.space_data