Add core classes and tests for Groq AI compatibility, logging, and model services

- Implement Groq_AI_Compatibility_Service to manage WooCommerce dependency and admin notices.
- Create Groq_AI_Log_Scheduler for scheduled log cleanup based on settings.
- Develop Groq_AI_Model_Service for model selection and caching.
- Add language translations in POT file for Dutch.
- Set up PHPUnit configuration and bootstrap for testing.
- Implement unit tests for model exclusions, provider request building, settings management, and term saving functionality.

tests/TermSaveTest.php

@@ -0,0 +1,67 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+
+class TermSaveTest extends TestCase {
+	protected function setUp(): void {
+		$GLOBALS['wp_term_updates'] = [];
+		$GLOBALS['wp_term_meta_updates'] = [];
+		$GLOBALS['wp_filters'] = [];
+	}
+
+	public function test_save_term_generation_result_saves_descriptions_and_filtered_meta_key() {
+		$plugin = new class {
+			public function get_settings() {
+				return [ 'term_bottom_description_meta_key' => '' ];
+			}
+			public function is_module_enabled( $module, $settings = null ) {
+				return false;
+			}
+		};
+
+		$controller_ref = new ReflectionClass( Groq_AI_Ajax_Controller::class );
+		$controller = $controller_ref->newInstanceWithoutConstructor();
+		$plugin_prop = $controller_ref->getProperty( 'plugin' );
+		$plugin_prop->setAccessible( true );
+		$plugin_prop->setValue( $controller, $plugin );
+
+		add_filter(
+			'groq_ai_term_bottom_description_meta_key',
+			function ( $default_key ) {
+				return 'Custom Key';
+			},
+			10,
+			3
+		);
+
+		$term = (object) [
+			'term_id' => 12,
+			'taxonomy' => 'product_cat',
+			'name' => 'Test',
+			'description' => '',
+		];
+
+		$result = [
+			'top_description' => '<p>Dit is een test.</p>',
+			'bottom_description' => '<p>Onderste tekst.</p>',
+		];
+
+		$settings = $plugin->get_settings();
+
+		$method = $controller_ref->getMethod( 'save_term_generation_result' );
+		$method->setAccessible( true );
+		$saved = $method->invoke( $controller, $term, $result, $settings );
+
+		$this->assertIsArray( $saved );
+		$this->assertSame( 4, $saved['words'] );
+
+		$this->assertCount( 1, $GLOBALS['wp_term_updates'] );
+		$this->assertSame( 12, $GLOBALS['wp_term_updates'][0]['term_id'] );
+		$this->assertSame( 'product_cat', $GLOBALS['wp_term_updates'][0]['taxonomy'] );
+		$this->assertSame( '<p>Dit is een test.</p>', $GLOBALS['wp_term_updates'][0]['args']['description'] );
+
+		$this->assertArrayHasKey( 12, $GLOBALS['wp_term_meta_updates'] );
+		$this->assertArrayHasKey( 'customkey', $GLOBALS['wp_term_meta_updates'][12] );
+		$this->assertSame( '<p>Onderste tekst.</p>', $GLOBALS['wp_term_meta_updates'][12]['customkey'] );
+	}
+}