feat: scaffold plugin foundation

src/Activator.php

@@ -0,0 +1,19 @@
+<?php
+/**
+ * Plugin activation lifecycle hook.
+ *
+ * @package WPContentSync
+ */
+
+namespace WPContentSync;
+
+use WPContentSync\Settings\Settings;
+use WPContentSync\Settings\SettingsRepository;
+
+final class Activator {
+	public static function activate(): void {
+		if ( false === get_option( SettingsRepository::OPTION_NAME, false ) ) {
+			update_option( SettingsRepository::OPTION_NAME, Settings::fromArray( array() )->toArray(), false );
+		}
+	}
+}