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/TaskMeta/ListGroupsTool.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Mcp\Tool\TaskMeta;
+
+use App\Repository\TaskGroupRepository;
+use Mcp\Capability\Attribute\McpTool;
+
+#[McpTool(name: 'list-groups', description: 'List task groups, optionally filtered by project. Groups are per-project (each group belongs to one project).')]
+class ListGroupsTool
+{
+    public function __construct(
+        private readonly TaskGroupRepository $taskGroupRepository,
+    ) {}
+
+    public function __invoke(?int $projectId = null, bool $archived = false): string
+    {
+        $criteria = ['archived' => $archived];
+        if (null !== $projectId) {
+            $criteria['project'] = $projectId;
+        }
+
+        $groups = $this->taskGroupRepository->findBy($criteria, ['title' => 'ASC']);
+
+        return json_encode(array_map(fn ($g) => [
+            'id'          => $g->getId(),
+            'title'       => $g->getTitle(),
+            'description' => $g->getDescription(),
+            'color'       => $g->getColor(),
+            'project'     => [
+                'id'   => $g->getProject()->getId(),
+                'code' => $g->getProject()->getCode(),
+                'name' => $g->getProject()->getName(),
+            ],
+            'archived' => $g->isArchived(),
+        ], $groups));
+    }
+}