Teleportationstrank: yellow potions open the portal window

- Every yellow potion (potion kind 5, all stages) is a Teleportationstrank:
  drinking it posts the teleporter's event to the busy dialog with the
  hero's known portals; the potion is used up only when the hero teleports
  from that window (closing it keeps the potion)
- Names replaced in every game text (ReplaceInTexts), so item names and the
  bottom bar's quick-select tooltip read Teleportationstrank; GameText reads
  the game's own text
- HeroIndex / HeroInventory moved to skillslots for shared use
- docs/teleport-potion.md; walking animation after loading noted in todo

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

tools/names.txt

@@ -245,3 +245,10 @@
 0x004ec170 cCreature::CanCollectItem       # (item object), ret 4; pickup filter, no distance check
 0x00592ef0 WideString_Append                 # thiscall (first, last, 0), ret 0xc; {begin,end,cap}
 0x00589270 cCreatureArts::ArtTooltip        # (art, text*, flag), ret 0xc
+0x004ae330 cInterpretSQW::Teleporter        # script: adds the portal bit (hero +0x578), posts busy dialog mode 5/6
+0x00720180 cUI_BusyDlg::SetMode             # (mode, a, b), ret 0xc; 5 = known portals
+0x00720c10 cUI_BusyDlg::HandleEvent         # UI event 0x39 to DEFAULT_BUSYDLG, +8 == 2: SetMode(+0xc)
+0x0054d840 cCreature::Teleport              # (x, y, 0, 1), ret 0x10
+0x00553080 cEvent_UI::cEvent_UI             # (type, target, sender, a..f), ret 0x24
+0x00428700 cItemTypeTable::NameText         # (type), ret 4: text id of the type's name (+0x20)
+0x0054a8f0 cCreature::UseItem               # (id), ret 4: event 0x10 to the item, removes it if used up