refactor: remove custom CSAT survey

[RaduCristianPopescu]

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• Have you followed the Optimole Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Removed functionalities added in:
4631784

Closes https://github.com/Codeinwp/optimole-service/issues/1548

How the test

• The custom CSAT survey should no longer appear since it has been removed.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully ran tests with your changes locally?

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Pull Request Overview

This PR removes CSAT (Customer Satisfaction) survey functionality that was previously added to the Optimole WordPress plugin. The changes systematically eliminate all CSAT-related code, settings, and UI components.

• Removes CSAT settings registration and related database functionality
• Eliminates CSAT survey UI components and associated logic
• Cleans up dashboard strings and utilities related to customer feedback collection

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
inc/settings.php	Removes CSAT settings registration and initialization hook
inc/admin.php	Removes CSAT-related dashboard strings while keeping minimal close button text
assets/src/dashboard/utils/use-settings.js	Completely removes the WordPress settings utility hook
assets/src/dashboard/parts/connected/settings/index.js	Removes settings visit tracking logic
assets/src/dashboard/parts/connected/index.js	Removes CSAT component import and rendering
assets/src/dashboard/parts/connected/csat/index.js	Completely removes CSAT modal component
assets/src/dashboard/parts/connected/CSAT.js	Completely removes CSAT wrapper component with survey pages

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