[Ohrrpgce] wip r13926: "insensitive string equal" (also "insensitive string compare")

[cron at rpg.hamsterrepublic.com]

https://github.com/ohrrpgce/ohrrpgce/commit/8effa380348ac68ebce777e414d6949c1d098a05
Author: james <james at 7d344553-34f0-0310-a9b1-970ce8f1c3a2>
Date:   Sun Jun 29 00:56:28 2025 +0000

    "insensitive string equal" (also "insensitive string compare")
    

 const.bi                 |  2 +-
 docs/platformdict.xml    |  2 +-
 docs/plotdict.xml        | 11 ++++++++++-
 docs/plotdictionary.html | 21 +++++++++++++++++++--
 plotscr.hsd              |  2 ++
 scriptcommands.bas       |  5 +++++
 testgame/hstests.hss     |  7 +++++++
 whatsnew.txt             |  1 +
 8 files changed, 46 insertions(+), 5 deletions(-)