refactor: annotation presets (L5)

The 41 abilities return Annotations::read(), ::write(idempotent) or
::destructive(idempotent) instead of hand-written arrays (same arrays, same
key order).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7

tests/Unit/Abilities/AnnotationsTest.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Tests\Unit\Abilities;
+
+use LIT\MCP\Abilities\Annotations;
+use PHPUnit\Framework\TestCase;
+
+final class AnnotationsTest extends TestCase
+{
+    public function testPresets(): void
+    {
+        self::assertSame(['readonly' => true, 'destructive' => false, 'idempotent' => true], Annotations::read());
+        self::assertSame(['readonly' => false, 'destructive' => false, 'idempotent' => false], Annotations::write(false));
+        self::assertSame(['readonly' => false, 'destructive' => false, 'idempotent' => true], Annotations::write(true));
+        self::assertSame(['readonly' => false, 'destructive' => true, 'idempotent' => false], Annotations::destructive(false));
+        self::assertSame(['readonly' => false, 'destructive' => true, 'idempotent' => true], Annotations::destructive(true));
+    }
+}