Prefer Tools::str2url for slug normalization (PS 9 compatibility, fallback to link_rewrite)

[CySSoO]

Motivation

• Prestashop 9 deprecates/changes Tools::link_rewrite in favor of Tools::str2url, so the module must prefer str2url while remaining compatible with Prestashop 8.
• Ensure slug/filename normalization and route rules produce correct, stable rewrites across PS versions.

Description

• Replace direct Tools::link_rewrite calls with a conditional that uses Tools::str2url when available and falls back to Tools::link_rewrite otherwise across the module.
• Update module configuration handling for EVERBLOCK_PAGES_BASE_URL and EVERBLOCK_FAQ_BASE_URL and route generation in hookModuleRoutes in everblock.php.
• Normalize guided selector keys/answers and route rewrites in everblock.php to use the new conditional logic.
• Update admin, model and front-end generation of slugs and filenames in controllers/admin/AdminEverBlockPageController.php, models/EverblockPage.php, controllers/front/slotmachine.php, and src/Service/EverblockTools.php to prefer Tools::str2url with fallback.

Testing

• No automated tests were executed for this change.

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Codex Task