refactor(editor): extract --strip-zone / --strip-project into cli_strip.cpp

Moves the two cleanup-pass handlers (--strip-zone,
--strip-project) out of main.cpp into a new
cli_strip.{hpp,cpp} module. Both remove derived outputs
(.glb / .obj / .stl / .html / .dot / .csv / .png /
ZONE.md / DEPS.md) leaving only source files. Useful before
--pack-wcp so archives don't carry redundant exports, and
before committing to git so derived blobs don't bloat
history. Both honor --dry-run for safe previews.

main.cpp shrinks by 164 lines (4,110 to 3,946).

tools/editor/cli_strip.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+namespace wowee {
+namespace editor {
+namespace cli {
+
+// Dispatch the strip-* cleanup handlers — remove derived
+// outputs (.glb / .obj / .stl / .html / .dot / .csv / .png /
+// ZONE.md / DEPS.md) leaving only source files. Useful before
+// --pack-wcp so archives don't carry redundant exports, or
+// before committing to git so derived blobs don't bloat
+// history. Both honor --dry-run for safe previews.
+//   --strip-zone     clean one zone's top-level derived files
+//   --strip-project  walk every zone in a project, per-zone report
+//
+// Returns true if matched; outRc holds the exit code.
+bool handleStrip(int& i, int argc, char** argv, int& outRc);
+
+} // namespace cli
+} // namespace editor
+} // namespace wowee