[build] Misc fixes

[ghaerr]

Swaps txtetris for nxlandmine on 1440k floppy #1805.
Adds beep to 144k floppy #1796 (comment).
Enables CONFIG_ASYNCIO when direct floppy driver selected #1803 (comment).

[toncho11]

I think you can add builds for the DF driver as well in Github Actions:

• direct-floppy-360-minix-needs-testing
• direct-floppy-1440-minix-needs-testing

[ghaerr]

I think you can add builds for the DF driver as well in Github Actions:

The Github Actions are already quite slow... perhaps just add the DF driver and CONFIG_ASYNCIO into the existing Github Actions builds, as well as the default builds using make menuconfig. That should do the same thing.

This will allow a kernel and images to be produced that will work for both BIOS and DF drivers (still defaulting to BIOS for backwards compatibility unless DF enabled in /bootopts), which then might be a good idea to increment our release to 0.8.0?

[toncho11]

Yes. If the DF driver is not taking too much kernel space I think it is a very good idea to add it to the default build, so that people can test (by changing the config once they boot the first time).

Yes, I am always for regular releases. So for me 0.8.0 makes sense. It gives the beat a project needs.