Feature: Implement RESTORE command

[SchoolyB]

The RESTORE command will go hand-in-hand with the BACKUP command.

Ideally the steps are as follows:

• User enters command BACKUP COLLECTION foo
• They are then prompted to enter the name of the new backup file. In this case "test"
• a test.ost file gets created in bin/backups
• user enters RESTORE COLLECTION foo

At this point I run into some issues:

1. How will the program know what collection foo is, if we named the backup something else/
2. When a backup file is created in this case 'test.ost', should the original name 'foo' be appended to the bottom of the file? This would tell the program that "Hey this backup file is a version of the file 'foo'".
3. If there have been changes to foo.ost and the user chooses to RECOVER the backup should there be anykind of prompt saying "Hey you are about to lose any changes you've made because the backup you want to recover is an older version of this collection file."?