fix: declare @nrfcloud/validate-with-typebox as a runtime dependency

`problemResponse.ts`, `validateInput.ts` and `validateResponse.ts` import
`@nrfcloud/validate-with-typebox`, but it was declared as a devDependency, so it
is missing from the published package's dependency tree.

This did not surface while the package was published to JSR: JSR's NPM
compatibility build derives the dependency list from the actual imports, so it
published `@jsr/nrfcloud__validate-with-typebox` as a runtime dependency
regardless of how it was declared here. The NPM build publishes the declared
dependencies verbatim, so the mis-declaration became a real defect.

Consumers that do not happen to have `@nrfcloud/validate-with-typebox` in their
own dependency tree fail at import time with ERR_MODULE_NOT_FOUND.

Author: coderbyheart

package-lock.json

@@ -34,7 +34,6 @@
   },
   "devDependencies": {
     "@bifravst/prettier-config": "1.1.17",
-    "@nrfcloud/validate-with-typebox": "1.0.6",
     "@swc/core": "1.15.47",
     "@types/aws-lambda": "8.10.162",
     "@types/node": "25.9.5",
@@ -70,6 +69,7 @@
     "@middy/core": "7.7.2",
     "@middy/input-output-logger": "7.7.2",
     "@nrfcloud/problem-detail": "1.4.4",
+    "@nrfcloud/validate-with-typebox": "1.0.6",
     "@sinclair/typebox": "0.34.52"
   }
 }