Maintenance after 20251126 cleanup

Maintenance after !2616 (merged) (acceptance of switches) that consists of:

1. Removal/addition of empty lines at the places of switches such that the frameworks are aligned
2. Occasional removal of development stuff that was present in one of the frameworks only, typically of an ‘include’ or a todo comment
3. A few corrections of comments
4. A few addition of ‘test()’ basop operators
5. Forgotten replacement of hard-coded number by macro for 65535 -> IVAS_DEFAULT_AEID
6. Renaming of the parameter Opt_RoomSize -> room_size (introduced under FIX_1318_ROOM_SIZE_CMD_LINE)
7. Changes in options.h in the basop framework:
   • removal of section “BASOP porting switches”
   • add sections “BE switches” and “non-BE” switches
   • Rename section “Development switches” to “Maintenance switches” (in float)

-> options.h is thus now aligned between basop and float in ivas-codec-pc/ivas-codec!2426