e2e: comprehensive POM for WDS

[Arpit529Srivastava]

Description

This PR adds a comprehensive Page Object Model (POM) for the WDS (Workload Discovery Service) page to support end-to-end testing. The WDSPage class extends BasePage and provides a robust set of methods and locators for interacting with all major features of the WDS interface.

Related Issue

Under #2159

Changes Made

• Added WDSPage class extending BasePage with locators for UI elements (buttons, canvas, tables, filters, panels, etc.)
• Added navigation methods (goto(), ensureOnWdsPage(), waitForPageLoad())
• Added view switching methods (tiles/list view switching, state checks, wait conditions)
• Added filtering and context selection methods (selectContext(), applyFilter(), clearFilters())
• Added node interaction methods (click, select in tiles/list view, selection checks)
• Added details panel management methods (isDetailsPanelOpen(), closeDetailsPanel())
• Added utility methods (item counts, resource counts, empty state checks)
• Added pagination methods (get pagination info, navigate next/previous)
• Added verification methods (verify view mode buttons, tiles/list view rendering)

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• Updated ...
• Refactored ...
• Fixed ...
• Added tests for ...

Checklist

Please ensure the following before submitting your PR:

• I have reviewed the project's contribution guidelines.
• I have written unit tests for the changes (if applicable).
• I have updated the documentation (if applicable).
• I have tested the changes locally and ensured they work as expected.
• My code follows the project's coding standards.

Screenshots or Logs (if applicable)

Additional Notes

[Arpit529Srivastava]

/cc @btwshivam

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[kubestellar-prow]

LGTM label has been added.

Git tree hash: e6db0d638c89b7d64ead0899e0342e2b1c43d120

[btwshivam]

/approve
/ok-to-test

[kubestellar-prow]

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