Quests: escorts stay on the follower list, quest givers come back

Escorts lost their place on the hero's follower list after a load, so
quest checks like the one in "Furchtbares Verbrechen" failed; they are
added back once after loading (town NPCs that tag along briefly are left
out). Restarted quests stay available (flag 1), which their giver's dialog
and accepting them need. Quest givers are read from the quest scripts:
when a running quest's giver dies, the quest restarts and the giver is
spawned again at her start; an accepted quest without its giver is repaired
on load. Notes on the script format and opcodes in docs/quests.md.

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

tools/names.txt

@@ -413,3 +413,21 @@
 0x0044ddc0 cCreature::SetDirectionVector       # thiscall (vec3*, ?), ret 8: writes +0x70..+0x78
 0x004265c0 TypeTable_IsKind4                   # thiscall (type table *0xaa9564, type), ret 4: the type's kind byte is 4
 0x0049a180 cDialogManager::DialogType         # thiscall (dialog, creature), ret 8: record +0x48 of 0x50-byte records at +0x755c; creature flags 0x1000.. -> 0x20..0x23
+0x0046de10 Quest_Trigger                      # cdecl (index, ?, ?): makes a quest available (flag 1, busy 8), runs its init label +0x114 once and its trigger label +0x10c
+0x0046ced0 Quest_End                          # quest manager thiscall (index, ?, success), ret 0xc: book entry 100 / 101
+0x00475970 Script_RunInstruction              # quest manager thiscall (code, &offset, quest, object, flag, 0), ret 0x18: one instruction; offset -1 reads from the FILE*
+0x00498aa0 Script_Condition                   # thiscall: script conditions; case 0x40 "@npc": npc on the hero's follower list +0x39c (or +0x570)
+0x0048f320 Script_StartQuest                  # opcode 0x14 #quest: needs quest flag 1; runs the trigger label, adds the book entry
+0x0048f110 Script_EndQuest                    # opcode 0x0f: Quest_End of the current quest
+0x00482800 Script_Spawn                       # opcode 1: spawns a creature ("Res:<script id>", type, position, 0x09 dialog, 0x05 death label, ...)
+0x0048be30 Script_NpcMode                     # opcode 3: an NPC's mode (0x09 dialog, 0x0a follow + death label, ...)
+0x00464ec0 QuestManager_ScriptObjectId        # thiscall (script id, &object id), ret 8: map +0x7668, then all objects
+0x0044a390 cObject::ScriptId                  # thiscall, plain ret: +0x3c or the type's default
+0x0044a380 cObject::SetScriptId               # thiscall (script id)
+0x004b37b0 ScriptIdMap::operator[]            # thiscall (&key), ret 4: quest manager +0x7668
+0x0054b070 cCreature::AddFollower             # thiscall ({u32 id, u32, u8}*), ret 4: hero +0x39c list, unless the id is in it
+0x005145d0 cCreature::CombatMove              # combat arts' moves; case 0x43f Kanonenschuss, 0x43e Mörsergranate
+0x005ab400 cObjectFX::GatherTargets           # effect objects collect their targets (0x5ff820 at 0x5ab63d, effect in ebx)
+0x005ff820 cObjectManager::ObjectsInRange     # thiscall (out, position, type, only, radius = -1: type sizes), ret 0x14
+0x00428bb0 TypeTable::ObjectSize              # thiscall (type), ret 4: +0x14, default 50
+0x004fc810 Creature_StunChance                # (level, creature): level * 5 / creature level * 100