Set up ignores for Xcode project bundle (WOCommon, db2b0f0)

Created 7/20/2007, updated 3/5/2024

snippets

Ignore all ".mode1" files (including the new ".mode1v3" files created by Xcode 3) and all ".pbxuser" files (except for the default, "default.pbxuser").

Signed-off-by: Greg Hurrell <greg@hurrell.net>