refactor(editor): extract format inspection handlers into cli_format_info.cpp

Moves the proprietary-format inspection commands out of main.cpp
into their own translation unit. Each reads a Blizzard-format
file and prints its structure:

  --info-png        --info-blp
  --info-m2         --info-wmo
  --info-adt        --info-jsondbc

main.cpp drops 18,198 → 17,766 lines (-432). Behavior verified
by re-running --info-png on a generated noise texture.

tools/editor/cli_format_info.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+namespace wowee {
+namespace editor {
+namespace cli {
+
+// Dispatch the proprietary-format inspection handlers — each
+// reads a Blizzard-format file and prints its structure:
+//   --info-png    --info-blp
+//   --info-m2     --info-wmo
+//   --info-adt    --info-jsondbc
+//
+// Returns true if matched; outRc holds the exit code.
+bool handleFormatInfo(int& i, int argc, char** argv, int& outRc);
+
+} // namespace cli
+} // namespace editor
+} // namespace wowee