[Ohrrpgce] wip r13911: Update all of menustuf.rbas to use ItemDef instead of itembuf()

[cron at rpg.hamsterrepublic.com]

https://github.com/ohrrpgce/ohrrpgce/commit/2c75ae59146877bd9a59610c21ff5d979fb3011c
Author: james <james at 7d344553-34f0-0310-a9b1-970ce8f1c3a2>
Date:   Fri Jun 27 23:19:25 2025 +0000

    Update all of menustuf.rbas to use ItemDef instead of itembuf()
    

 loading.bi    |   3 +-
 loading.rbas  |   7 +++
 menustuf.rbas | 134 +++++++++++++++++++++++++++++-----------------------------
 3 files changed, 76 insertions(+), 68 deletions(-)