Rusty ROM OrgaNizer

Replace async-std with tokio
Add an info subcommand to display basic system and dependencies information
Only generate playlists for complete sets of games
Exit gracefully in most places when missing an external program
Use 7zz instead of 7z on mac
Don't silently delete files in check-roms
Add support for ZSO
Add optional dependency on bchunk
Allow filtering games by name in check-roms
Traits! Makes parts of the code actually reusable
Add an optional post-conversion check
Fix importing a couple more bogus DAT files
Accept ZIP files as input for import-dats
Add a -u flag to import-roms to skip user prompts
Add a -s flag to convert-roms to select systems by name
Update the -s flag in import-roms to behave the same as in convert-roms
Add a -f flag in purge-roms to track and delete foreign files in the ROM directory
Add a new export-roms subcommand
Add support for WBFS in export-roms