Add Playwright E2E test for heuristic study creation (inspection category)

[Akshay-Varma7]

Description

This PR adds an end-to-end Playwright test covering the heuristic study creation flow in RUXAILAB.
The test validates the current study creation workflow for the Inspection(category) → Heuristic Evaluation .
(also used existing e2e tests as reference)

What this test covers

The following user flow is tested:

1. Admin login
2. Create new study
3. Select category: Inspection
4. Select method: Heuristic Evaluation
5. Select study type: Start with Blank Study
6. Fill study details
7. Create study
8. Verify the created study appears on the dashboard

Impact

Some existing E2E tests appear to reference the older test creation workflow. Since the UI now represents these as studies, those tests may fail due to the updated interface.
This test reflects the current study-based workflow.

Local testing

The test was executed locally:

• Ran this test - Verified successful execution across Chromium and Firefox
• 

Future improvements

Next planned tests:

• Testing category study creation flow (one method)- Additional coverage for other study creation flows
  Happy to extend coverage for all study flows(following this pattern) if preferred.

Related Issue

Closes #1869

[sonarqubecloud]

Quality Gate passed

Issues
0 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