Bump WordPress Tested up to version 7.0

[qasumitbagthariya]

Description of the Change

Closes #202

How to test the Change

1. Run the e2e test using GitHub action to test this PR.
2. Do thorough manual visual validation, with a strong focus on the admin interface

Changelog Entry

Dev - Bump WordPress "tested up to" version 7.0.
Dev - Bump WordPress minimum supported version to 6.6.

Credits

Props @username, @username2, ...

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[qasumitbagthariya]

QA Update ❌

---

Issue 1:

When saving the settings, the settings page turns blank for a few seconds, while the “settings saved” notice appears at the top. After a few seconds, the page reloads and displays normally again.

Steps to Reproduce:

1. Navigate to the settings page
2. Make any changes
3. Click on the Save button

Expected Result:

1. The settings page should reload or update smoothly without showing a blank screen
2. The success notice should appear without any UI flicker or disruption

Screen.Recording.2026-03-27.at.1.43.24.PM.mov

cc @iamdharmesh