[Ohrrpgce] wip r13939: Add "{lock, unlock, swap in, swap out} hero by slot". Swap commands return new slot

[cron at rpg.hamsterrepublic.com]

https://github.com/ohrrpgce/ohrrpgce/commit/53cf9beb6e68800a1b54e3893f5f41d88544acea
Author: teeemcee <teeemcee at 7d344553-34f0-0310-a9b1-970ce8f1c3a2>
Date:   Mon Jun 30 00:19:06 2025 +0000

    Add "{lock,unlock,swap in,swap out} hero by slot". Swap commands return new slot
    
    That is, "swap in/out hero" also return the new slot number.
    

 const.bi                              |   2 +-
 docs/platformdict.xml                 |   2 +-
 docs/plotdict.xml                     |  57 +++++++++++++++++++--
 docs/plotdictionary.html              |  93 +++++++++++++++++++++++++++++++---
 plotscr.hsd                           |   8 ++-
 scriptcommands.bas                    |  32 ++++++++++--
 testgame/autotest.hss                 |  39 ++++++++++----
 testgame/autotest.rpgdir/general.reld | Bin 34258 -> 34496 bytes
 testgame/autotest.rpgdir/ohrrpgce.hsp | Bin 1224727 -> 1228441 bytes
 whatsnew.txt                          |   6 ++-
 10 files changed, 210 insertions(+), 29 deletions(-)