fix: rest-api-pagination

[imantsk]

ref: https://wordpress.org/support/topic/pagination-issue-in-code-snippets-rest-api/

[Copilot]

Pull Request Overview

This PR fixes pagination functionality in the Code Snippets REST API by implementing proper pagination parameters and headers. The changes enable clients to paginate through snippet collections using standard WordPress REST API conventions.

Key changes:

• Added support for standard REST API collection parameters (page, per_page) on the snippets endpoint
• Implemented pagination logic with proper slicing of results and response headers (X-WP-Total, X-WP-TotalPages)
• Updated CSS to use logical properties for better internationalization support

Reviewed Changes

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

File	Description
src/php/rest-api/class-snippets-rest-controller.php	Added pagination support with collection parameters, page slicing logic, and standard WordPress pagination headers
src/css/settings.scss	Converted directional CSS properties to logical properties for RTL language support

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