Improve debugging logic, minor bug fixes, etc.

Log floppy script output via `tee.js`
Include floppy script output in packer log via `dump-logs.cmd`
Beep on error
Standardize ssh password as D@rj33l1ng due to password requirements
Fix `sshd_server` username
Don't abort if shared folders are not available
Fix `pushd` in `script/vmtool.bat`
Fix small typo in `floppy/zz-start-sshd.cmd`
Undid sshd_server username fix as it just masks the issue
Add `ping` at end of scripts to force script output