With additional toggle entry,
automatic environment variable loading and retention,
DB client choice and usage flexibility with debug output control,
and the same for overall script flow control too,
including some other output control like OS detection,
extracted core specific info for easier and more efficient future code file updates between cores,
almost similarly for the script and release version variables,
and editor trailing space protection relevant to printing menu and prompt text.

File had only LFs causing trouble jumping to specific labels such as `ToggleRealmDB` and `RealmDB2`.

Taking care to incorporate the only change since the last update from this branch, 2023-02-11, which would be db02bef, on 2023-11-09.