Implement 3.5" Floppy Write Support and Blank Disk Creation

[maxolasersquad]

Summary

Add write support and blank disk image creation for 3.5" floppy formats (WOZ, 2MG, and DiskCopy 4.2) to allow formatting, saving data, and writing to 400 KB and 800 KB disks in the 3.5" drive.

Capabilities to Support

1. 3.5" Write Support

   • Support writing modified tracks back to 3.5" WOZ bitstream disk images (handling 80 tracks, 2 sides, and variable motor speed zones).
   • Support writing modified sectors back to 3.5" 2MG and DiskCopy 4.2 disk images.

2. Blank 3.5" Disk Image Creation

   • Support creating empty, formatted 800 KB (and 400 KB) 3.5" disk images (.2mg and .woz) for data storage and formatting in ProDOS and GS/OS.