feat(exclusions): Implement component exclusion system (Plan 99.11)

Adds ability to exclude components from specific:
- Categories (by slug or term_id)
- Post/Page IDs
- URL patterns (substring or regex)

Architecture:
- Domain: Value Objects (CategoryExclusion, PostIdExclusion,
  UrlPatternExclusion, ExclusionRuleSet) + Contracts
- Application: EvaluateExclusionsUseCase +
  EvaluateComponentVisibilityUseCase (orchestrator)
- Infrastructure: WordPressExclusionRepository,
  WordPressPageContextProvider, WordPressServerRequestProvider
- Admin: ExclusionFormPartial (reusable UI),
  ExclusionFieldProcessor, JS toggle

The PageVisibilityHelper now uses the orchestrator UseCase that
combines page-type visibility (Plan 99.10) with exclusion rules.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Shared/Infrastructure/Services/WordPressServerRequestProvider.php

@@ -0,0 +1,23 @@
+<?php
+declare(strict_types=1);
+
+namespace ROITheme\Shared\Infrastructure\Services;
+
+use ROITheme\Shared\Domain\Contracts\ServerRequestProviderInterface;
+
+/**
+ * Implementacion WordPress del proveedor de request HTTP
+ *
+ * Encapsula el acceso a $_SERVER.
+ *
+ * v1.1: Nuevo - extrae logica de acceso a superglobales
+ *
+ * @package ROITheme\Shared\Infrastructure\Services
+ */
+final class WordPressServerRequestProvider implements ServerRequestProviderInterface
+{
+    public function getRequestUri(): string
+    {
+        return $_SERVER['REQUEST_URI'] ?? '';
+    }
+}