Add TimeMachine dirs

https://web.archive.org/web/20190101000001/https://www.baligu.com/pondini/TM/Works2.html
https://web.archive.org/web/20201210025437/https://www.baligu.com/pondini/TM/30.html
/System/Library/CoreServices/backupd.bundle/Contents/Resources/StdExclusions.plist

Global/macOS.gitignore

@@ -43,3 +43,9 @@ TheVolumeSettingsFolder
 .quota.user
 .quota.ops.group
 .quota.ops.user
+
+# TimeMachine
+Backups.backupdb
+.MobileBackups
+.MobileBackups.trash
+MobileBackups.trash