[IMP] hr_recruitment_kmitl: add onboarding portal UI (tabs + forms + upload components)

[toeiisk]

Summary

Implement onboarding portal UI for candidates after job confirmation.

Scope

• Add multi-step onboarding tabs:

  1. Personal info (readonly)
  2. Education (readonly)
  3. Royal decorations (editable)
  4. Work / starting date (partial editable)
  5. Benefits & funds (file upload)
  6. Confirmation & document submission

• Reuse and standardize UI with Bootstrap-based layout

• Integrate reusable components:

  • document_upload_item
  • document_upload_card

Behavior

• Tabs 1–2: readonly (data from profile/applicant)
• Tabs 3–6: editable inputs + file uploads
• No backend binding yet (UI-first implementation)

Notes

• Prepared field names for future backend integration
• Upload components are used in mock-safe mode (no existing file binding yet)