feat(editor): add --gen-village-pack composite

Third composite pack (after --gen-camp-pack and
--gen-blacksmith-pack), emitting a 7-primitive village-square
scene into <outDir>:

  • house — main dwelling
  • outhouse — privy beside it
  • chimney — for the house roof piece
  • hitching-post — at the hitching rail
  • well — village square centerpiece
  • signpost — pointing the way out of town
  • haystack — from the nearby farm

Together these form a recognizable rural-village hub when
arranged in a zone. Uses the existing emitMeshPack helper —
the new pack is just an 8-line declarative table.

All 7 outputs validate clean (--validate-wom PASSED across
the board). Composite-pack catalogue now: camp + blacksmith
+ village.

tools/editor/cli_help.cpp

@@ -278,6 +278,8 @@ void printUsage(const char* argv0) {
     std::printf("                         Convenience: emit tent + firepit + bedroll + canopy + woodpile + haystack into outDir as 6 .wom files\n");
     std::printf("  --gen-blacksmith-pack <outDir>\n");
     std::printf("                         Convenience: emit forge + anvil + workbench + water-trough + crate-stack + hitching-post into outDir\n");
+    std::printf("  --gen-village-pack <outDir>\n");
+    std::printf("                         Convenience: emit house + outhouse + chimney + hitching-post + well + signpost + haystack into outDir\n");
     std::printf("  --gen-mesh-table <wom-base> [width] [depth] [height] [legThick] [topThick]\n");
     std::printf("                         Table: flat top slab on 4 corner legs (default 1.6/1.0/0.85/0.10/0.06)\n");
     std::printf("  --gen-mesh-lamppost <wom-base> [poleH] [poleT] [baseSize] [lanternSize] [lanternH]\n");