refactor(editor): extract --repair-zone / --repair-project into cli_repair.cpp

Moves the two manifest-drift fix handlers (--repair-zone,
--repair-project) out of main.cpp into a new cli_repair.{hpp,cpp}
module. Both auto-fix the common manifest-vs-disk
inconsistencies that accumulate when zones are hand-edited or
partially copied — adding orphan WHM tiles to the manifest,
syncing the hasCreatures flag with the actual creatures.json
content, and warning (not removing) for tiles in the manifest
without backing files. Both honor --dry-run for safe previews.

main.cpp shrinks by 155 lines (3,946 to 3,791).

tools/editor/cli_repair.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+namespace wowee {
+namespace editor {
+namespace cli {
+
+// Dispatch the repair-* manifest-drift fix handlers — auto-fix
+// the common manifest-vs-disk inconsistencies that accumulate
+// when zones are hand-edited or partially copied. Both honor
+// --dry-run for safe previews.
+//   --repair-zone     fix one zone (sync tiles, hasCreatures)
+//   --repair-project  per-zone wrapper with aggregate tally
+//
+// Returns true if matched; outRc holds the exit code.
+bool handleRepair(int& i, int argc, char** argv, int& outRc);
+
+} // namespace cli
+} // namespace editor
+} // namespace wowee