feat(bulk-import): add configurable instructions section for bulk import

[lokanandaprabhu]

Hey, I just made a Pull Request!

This PR introduces a fully configurable "How does it work" instructions section for the Bulk Import plugin, allowing administrators to customize workflow steps through app-config.yaml configuration.

Key Features:

Configurable Steps: Define custom workflow steps with personalized text and icons
Icon Support: Built-in theme-aware icons + custom URL-based icons
Dynamic Layout: Responsive design with horizontal scrolling for many steps (≤6 steps fill width, >6 enable scrolling)
User Preferences: Collapsed/expanded state persisted in localStorage per user

Screenshots

------When 3 steps are configured----

---

------When 5 steps are configured----

---

------When 6 steps are configured----

---

------When icon is not configured----

---

-------When no steps are configured

---

---

-----Save user preference

Screen.Recording.2025-12-31.at.11.52.39.AM.mov

✔️ Checklist

• A changeset describing the change and affected packages. (more info)
• Added or Updated documentation
• Tests for new functionality and regression tests for bug fixes
• Screenshots attached (for UI changes)

[rhdh-gh-app]

Important

This PR includes changes that affect public-facing API. Please ensure you are adding/updating documentation for new features or behavior.

Changed Packages

Package Name	Package Path	Changeset Bump	Current Version
@red-hat-developer-hub/backstage-plugin-bulk-import	workspaces/bulk-import/plugins/bulk-import	minor	v6.9.0

[sonarqubecloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud