BootUnlock 1.0

This is the initial release of the BootUnlock tool which allows users to unlock the secondary encrypted APFS volumes during the startup using passwords stored on the System keychain. It is assumed that the System keychain is located on the encrypted boot volume, hence from the security standpoint there is no compromise on security, but lots of convenience.

We would appreciate any feedback on the tool, but please make it constructive so we could action on it.