The mv moves your .plan file to the now world-readable subdirectory. You can do the same for your .project, and .klogin files, if you have them. You can grant permissions to individual users or groups. Since AFS permissions are by directory, you only need to setup the permissions on the directory and its existing subdirectories. Files inherit the permissions of their directory.
New subdirectories inherit their parent directory permissions.
You can then make a symbolic link from your home directory to the new directory. You may already have a public directory in your account. The mkdir command creates a directory named pub. The fs command makes the directory readable for any user. If you move a directory into this directory or use a symbolic link, however, you may need to adjust the permissions.