Hiring cafe extractor (#192)

* feat(hiringcafe): register new source across shared/server/client enums

* feat(hiringcafe-extractor): add browser-backed Hiring Cafe dataset extractor

* feat(orchestrator): integrate Hiring Cafe discovery service into pipeline

* feat(orchestrator-ui): add Hiring Cafe to source availability and run estimates

* chore(hiringcafe): wire CI/docker and add extractor documentation

* chore(format): apply biome formatting for Hiring Cafe integration

* add original websites

* coomints

* number or null

docs-site/sidebars.ts

@@ -45,6 +45,7 @@ const sidebars: SidebarsConfig = {
         "extractors/gradcracker",
         "extractors/jobspy",
         "extractors/adzuna",
+        "extractors/hiring-cafe",
         "extractors/manual",
         "extractors/ukvisajobs",
       ],