feat : add 22 MCP tool classes for projects, tasks, and time tracking

Tools: list-users, list-clients, list/get/create/update-project,
list/get/create/update/delete-task, list-statuses/priorities/efforts/tags,
list/create/update-group, list/create/update/delete-time-entry.

Attribute moved to class level for SDK discovery compatibility.
Install nyholm/psr7 for HTTP transport PSR-17 support.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Mcp/Tool/Task/DeleteTaskTool.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Mcp\Tool\Task;
+
+use App\Repository\TaskRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use InvalidArgumentException;
+use Mcp\Capability\Attribute\McpTool;
+
+use function sprintf;
+
+#[McpTool(name: 'delete-task', description: 'Delete a task permanently. This also deletes all associated documents.')]
+class DeleteTaskTool
+{
+    public function __construct(
+        private readonly TaskRepository $taskRepository,
+        private readonly EntityManagerInterface $entityManager,
+    ) {}
+
+    public function __invoke(int $id): string
+    {
+        $task = $this->taskRepository->find($id);
+
+        if (null === $task) {
+            throw new InvalidArgumentException(sprintf('Task with ID %d not found.', $id));
+        }
+
+        $taskCode = $task->getProject()->getCode().'-'.$task->getNumber();
+        $this->entityManager->remove($task);
+        $this->entityManager->flush();
+
+        return json_encode([
+            'success' => true,
+            'message' => sprintf('Task %s deleted.', $taskCode),
+        ]);
+    }
+}