fix: remove duplicate Quarkus entries in agent.yaml and install manifest

The salvage commit on main already registered the four Quarkus skills in
both agent.yaml and manifests/install-modules.json. This branch was adding
a second copy of each (alphabetically misplaced). Reverting both files to
origin/main so the registrations are not duplicated.

agent.yaml

@@ -135,10 +135,6 @@ skills:
   - security-scan
   - skill-comply
   - skill-stocktake
-  - quarkus-patterns
-  - quarkus-security
-  - quarkus-tdd
-  - quarkus-verification
   - springboot-patterns
   - springboot-security
   - springboot-tdd