Support Baseline 5.25" Formats: 2MG Floppy, WOZ v1, and 13-Sector Images

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Summary

Add read support for three baseline 5.25" disk formats on the standard Disk II controller to expand software compatibility with common archival collections.

Formats to Support

1. 2MG Floppy Images (.2mg, .2img)

   • Allow 140 KB 5.25" floppy disk images wrapped in 2MG containers to mount in Drive 1 and Drive 2 (currently 2MG is only supported for Slot 7 hard disks).
   • Support DOS order, ProDOS order, and nibblized 2MG floppy images.

2. WOZ v1 Images (.woz)

   • Support loading original WOZ v1 bitstream images in addition to the currently supported WOZ v2 format.

3. 13-Sector Disk Images (.dsk)

   • Support early 13-sector Apple II disk images (~113.75 KB / 116 KB) used by DOS 3.1 and DOS 3.2 software.