coco_flop: Add new software from colorcomputerarchive.com disk images

[udance4ever]

Commit adds the following software:

1. rnbadv1: Rainbow Book of Adventures (Falsoft)
2. rnbadv2: Second Rainbow Book of Adventures (Falsoft)
3. cocozone: Coco Zone (The Rainbow)
4. grover: Grover's Number Rover (CCW)
5. lansford: Lansford Mansion (Diecom Products) [cracked]
6. ralpha2: Rescue on Alpha II (The Rainbow)
7. ssleuth: Sam Sleuth (Computerware)
8. zaxxon: Zaxxon (Datasoft)

Disk images downloaded from Color Computer Archive (Games and Educational)

Added usage info for 3 existing software entries:

1. ccmax3: CoCo Max III (v3.0)
2. ccmax31: CoCo Max III (v3.1)
3. rbwd0288: Rainbow on Disk 1988-02 issue

Recent enhancement to Batocera Linux passes "usage" info to MAME's -autoboot_command option enabling autoloading of coco software (https://github.com/batocera-linux/batocera.linux/pull/11706)

Validated above 11 software titles autoload in Batocera Linux v39 (MAME v0.261) 🕹️