[Ohrrpgce] wip r13895: Add a few more records to ItemDef along with code to read them from ITM buffer format

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https://github.com/ohrrpgce/ohrrpgce/commit/96fc3d31fc0b9a9074f94a4d98ac4a3decab7114
Author: james <james at 7d344553-34f0-0310-a9b1-970ce8f1c3a2>
Date:   Fri Jun 20 23:27:45 2025 +0000

    Add a few more records to ItemDef along with code to read them from ITM buffer format
    

 loading.rbas | 15 +++++++++++++++
 udts.bi      | 12 ++++++++++++
 2 files changed, 27 insertions(+)