feat: Respect disallowed route modes in Location.navigate()

[webJose]

No description provided.

[Copilot]

Pull Request Overview

This PR enhances the Location.navigate() method to respect disallowed routing modes by adding validation checks before navigation occurs.

• Adds a call to assertAllowedRoutingMode() in the navigate() method to validate routing permissions
• Updates test mocks to include a setter for the search property
• Adds comprehensive test coverage for both query preservation and disallowed routing mode scenarios

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/testing/test-utils.ts	Adds search property setter to location mock for better test compatibility
src/lib/core/LocationLite.svelte.ts	Integrates routing mode validation into the navigate method
src/lib/core/LocationLite.svelte.test.ts	Adds extensive test coverage for navigate method behavior and routing restrictions

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