[1546] Add e2e tests for Browse Testimonies page

[seatuna]

Summary

This PR adds e2e tests for the Browse Testimonies page per this issue: #1546

Success Criteria

• Playwright test covering the Browse Testimonies page, including:
• Able to find Testimony via Text Search
• Able to sort Testimonies as expected
• Able to filter Testimonies as expected (via facets in left sidebar)
• Able to filter Testimonies from All / Individuals / Orgs (via tabs at top of page)
• Able to click a Testimony and successfully navigate to the Testimony Detail page for that testimony
  This addresses a specific bug we encountered in the generation of links to testimony detail pages

Screenshots

Known issues

• I had to increase the default timeout for tests to decrease flakiness for Firefox tests due to Firefox tests running slower than Chrome. This is a known issue: [Question] Performance issues on Firefox? microsoft/playwright#1396
• My laptop is too old and can't upgrade to a compatible version of webkit, so the tests were only run against Chrome and Firefox.

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Name	Status	Preview	Comments	Updated (UTC)
maple-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 12, 2024 9:06pm

[Mephistic]

💯 LGTM!