Add `info` subcommand

[Aareon]

Add an info subcommand that displays archive information including:

• MPQ format version
• Archive name
• Archive size (in kb)
• Number of files in archive
• Maximum file count of archive
• Hash table size
• Block table size
• Sector size
• Archive partial state
• Archive encrypted state
• Archive signature state

[Aareon]

Most information can be gathered from FileHeader