feat(ui): add contextual tooltips/notes in job creation/edit flows

[aledefra]

Summary

• add a reusable FieldHelpPopover component for compact inline help
• extend shared form wrappers (InputWithLabel, SelectWithLabel, NumberInputWithLabel) with optional labelHelp support
• add contextual tooltips/notes across the job creation/edit UI, especially around:
  • node selection/filtering and KYB/KYC semantics (KYB = companies, KYC = individuals)
  • deployment runner config (container/worker inputs, credentials, policies)
  • tunneling fields, tunnel selection/reuse, and token meaning
  • dynamic env, file volumes, custom params, and env variable handling
• clarify monthly estimate semantics where shown as approximate values (1 month = 30 days)

Validation

• npm run lint
• NEXT_PUBLIC_API_URL=http://localhost:5000 NEXT_PUBLIC_ENVIRONMENT=devnet npm run build

Notes

• default npm run build in this repo can fail without env setup (NEXT_PUBLIC_API_URL), so build validation was run with explicit env values.