[Console] webapp-v2 DevOps — CI, labels, merge with dev

[shangeyao]

Summary

Parent: #4414
Depends on: #4415 branch

Align DevOps for streampark-console-webapp-v2:

• frontend.yml path filter scoped to webapp-v2
• Labeler / boring-cyborg component for webapp-v2
• Merge latest dev ([Build] Raise StreamPark compile and CI baseline to JDK 11 #4417 JDK11, [Flink] Remove dev framework and connector wrappers #4432, [Build] Switch to 3.0.0-SNAPSHOT using Maven revision property #4426 ${revision})
• README Maven/CI ops section

Acceptance

• Frontend CI runs on webapp-v2-only changes
• PR [Console] Add Naive UI based console webapp v2 frontend #4415 mergeable with dev
• frontend.project.name=streampark-console-webapp-v2 preserved

[shangeyao]

Addressed in commit 5bb726e on feature/frontend-naive-ui-refactor: merged dev, frontend.yml path filter, labeler/cyborg webapp-v2 component, README Maven/CI section.