[Ohrrpgce] wip r13928: Add new commands "string to lower" and "string to upper"

[cron at rpg.hamsterrepublic.com]

https://github.com/ohrrpgce/ohrrpgce/commit/34a108d4f596fab0e76111bbed637f9b005b0987
Author: james <james at 7d344553-34f0-0310-a9b1-970ce8f1c3a2>
Date:   Sun Jun 29 15:49:16 2025 +0000

    Add new commands "string to lower" and "string to upper"
    

 const.bi           |  2 +-
 plotscr.hsd        |  2 ++
 scriptcommands.bas | 10 ++++++++++
 3 files changed, 13 insertions(+), 1 deletion(-)