v0.4.0-pre1: The Third Overhaul, Part One

Improvements:

• Rwfus now requests it be started after Decky-Loader, if present.
  This avoids a (timing?) bug where Decky would sometimes death-spiral indefinitely trying to connect to Steam
• Rwfus no longer clutters /etc/systemd/system with extraneous .mount units, instead managing everything from a single shell script that runs once and gets out of the way.
• Rwfus no longer tries to reinstall itself by default, instead printing the status of rwfusd. Fixes #9
• Certain commands now have shortopt codes (see rwfus --help for info)

Breaking Changes:

• Default Base_Directory changed from /home/.rwfus to /opt/.rwfus
• Workdirs go in Base_Directory/work now
• Upper dirs get their own subdirectory now: Base_Directory/upper
• Rwfus no longer generates systemd mount or target units
  • Now it generates daemons and service units
  • This is a total overhaul of Rwfus's init

Features Planned for v0.4.0-pre2:

• Work around #12 by storing Rwfus data in a monolithic ext4/btrfs partition image
• Dynamically resize image when nearing full capacity and storage is available Sparse files exist 👍🏽

Features Planned for v0.4.0 final

• Automatically configure pacman-key after a successful install (#6)
• Add --backup and --restore operations (#7)