test(05-01): scaffold routing workspace with failing contract suite

- fifth npm workspace @araharah/routing (buildless TS, search/ precedent)
- root delegates routing:test / routing:typecheck / routing:corpus
- C1-C6 RED: contract gates fail while src/types.ts + seed are absent

package.json

@@ -6,7 +6,8 @@
     "theme",
     "bot",
     "web",
-    "search"
+    "search",
+    "routing"
   ],
   "scripts": {
     "build": "npm run build -w theme && npm run build -w web",
@@ -26,6 +27,9 @@
     "search:test": "npm test -w search",
     "search:typecheck": "npm run typecheck -w search",
     "search:corpus": "node search/scripts/gazetteer-corpus.mjs",
+    "routing:test": "npm test -w routing",
+    "routing:typecheck": "npm run typecheck -w routing",
+    "routing:corpus": "node routing/scripts/route-corpus.mjs",
     "web:dev": "npm run dev -w web",
     "web:build": "npm run build -w theme && npm run build -w web",
     "web:build:harness": "npm run build:harness -w web",