fix(portal-clis): pin @types/node in the four @bunli/core CLIs so typecheck passes on a clean install (closes #765) (#768)

* fix(portal-clis): pin @types/node in the @bunli/core CLIs

image-q pins @types/node 16.9.1 exactly, and with bun 1.4.4 a clean
install hoists it, so fetch/Response/URL/Headers vanish from typecheck.
Declare @types/node 26.6.5 as a devDependency in jobbank-search,
jobdanmark-search, jobindex-search and jobnet-search, and add a guard
test that checks every @bunli/core CLI does so.

Closes #765

Generated by NightShift

* docs(changelog): note the @types/node pin for the @bunli/core CLIs (#768)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

---------

Co-authored-by: Mads Lorentzen <madslorentzen_17@hotmail.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

.agents/skills/jobdanmark-search/cli/package.json

@@ -19,7 +19,8 @@
     "zod": "^3.23.0"
   },
   "devDependencies": {
-    "typescript": "^5.4.0",
-    "@types/bun": "1.3.14"
+    "@types/bun": "1.3.14",
+    "@types/node": "26.6.5",
+    "typescript": "^5.4.0"
   }
 }