refactor(editor): extract zone/project mesh-bake handlers into cli_bake.cpp

Moves the 3D-export bake handlers out of main.cpp:
  --bake-zone-glb     --bake-zone-stl     --bake-zone-obj
  --bake-project-obj  --bake-project-stl  --bake-project-glb

The STL + GLB project bakes share a combined dispatcher (one
function with internal STL-vs-GLB branching) since they walk
the same per-zone asset list and only differ in the output
emission code.

main.cpp drops 12,119 → 11,261 lines (-858). The combined-OR
opener spanning multiple lines created a parse-error fragment
in the extraction; caught + manually fixed before commit
(same pattern as the WOM info attachments/particles/sequences
extraction).

tools/editor/cli_bake.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+namespace wowee {
+namespace editor {
+namespace cli {
+
+// Dispatch the zone & project mesh-bake handlers — these stitch
+// every WHM heightfield + WOM/WOB asset in a zone into a single
+// 3D file (.obj / .stl / .glb) for external DCC import.
+//   --bake-zone-glb       --bake-zone-stl       --bake-zone-obj
+//   --bake-project-obj    --bake-project-stl    --bake-project-glb
+//
+// Returns true if matched; outRc holds the exit code.
+bool handleBake(int& i, int argc, char** argv, int& outRc);
+
+} // namespace cli
+} // namespace editor
+} // namespace wowee