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>

composer.json

@@ -14,6 +14,7 @@
         "doctrine/orm": "^3.6",
         "lexik/jwt-authentication-bundle": "^3.2",
         "nelmio/cors-bundle": "^2.6",
+        "nyholm/psr7": "^1.8",
         "phpdocumentor/reflection-docblock": "^5.6|^6.0",
         "phpstan/phpdoc-parser": "^2.3",
         "symfony/asset": "8.0.*",