refactor(editor): extract quest+objective handlers into cli_quest_objective.cpp

Moves three contiguous quest mutation handlers (--add-quest,
--add-quest-objective, --remove-quest-objective) out of
main.cpp into a new cli_quest_objective.{hpp,cpp} module.
All three operate on a zone's quests.json with the same
QuestEditor load-edit-save flow; the objective add/remove
pair includes auto-generated description text from
type+name+count for tooltip-friendly defaults.

main.cpp shrinks by 174 lines (6,603 to 6,429). Reward and
clone-quest handlers stay inline for follow-up extractions.

tools/editor/cli_quest_objective.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+namespace wowee {
+namespace editor {
+namespace cli {
+
+// Dispatch the quest / quest-objective mutation handlers.
+// All three operate on a zone's quests.json:
+//   --add-quest                append a new quest (title + opt fields)
+//   --add-quest-objective      append an objective to an existing quest
+//   --remove-quest-objective   remove an objective by index
+//
+// Reward and clone-quest operations live in their own
+// modules (cli_quest_reward / cli_clone) so the per-quest
+// objective logic stays focused.
+//
+// Returns true if matched; outRc holds the exit code.
+bool handleQuestObjective(int& i, int argc, char** argv, int& outRc);
+
+} // namespace cli
+} // namespace editor
+} // namespace wowee