Phase 3 sub-commit 3: examples/todo POC app, built via the makers

Standalone Composer/CMake project under examples/todo/ derived from the
skeleton, demonstrating every Phase 3 architectural primitive in a
non-trivial app. All cross-side wiring is maker-generated; no
handwritten bridge glue.

Generated and customised:

  - src/Entity/Todo.php — make:bridge:resource Todo (UUIDv7 id)
  - src/Controller/TodoController.php — make:bridge:resource Todo (CRUD)
  - src/Controller/MarkAllDoneController.php — make:bridge:command
    MarkAllDone, body filled in to flip done=true on every row
  - qml/TodoList.qml — make:bridge:resource Todo (starter ListView)
  - qml/TodoWindow.qml — make:bridge:window Todo, body customised to
    embed a read-only mirror of the same ReactiveListModel

The Phase 1 ping demo is dropped from this app — it doesn't fit the
todo flow and nothing in Main.qml references it.

Main.qml is the real list UI:

  - Add input + button (POST /api/todos with optimistic-friendly key).
  - Per-row CheckBox + delete button (PATCH/DELETE via
    todoModel.invoke() with `pending` role driving opacity).
  - "Mark all done" button (POST /api/mark-all-done).
  - "Open second window" button (Component { TodoWindow {} } pattern).

Build / run delegated to the same Makefile shape as the skeleton, with
SCRIPT_DIR/QT_BIN updated for the renamed binary (build/qml/todo).
composer.json's path repo points at ../../../framework/php (one level
deeper than the skeleton's path repo).

Verified end-to-end with offscreen QPA: POST/PATCH/DELETE on /api/todos
all round-trip, /api/mark-all-done flips every row, Mercure dual-
publishes on every change. Clean shutdown.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

examples/todo/symfony/composer.json

@@ -0,0 +1,46 @@
+{
+    "type": "project",
+    "license": "proprietary",
+    "minimum-stability": "stable",
+    "require": {
+        "php": "^8.3",
+        "symfony/framework-bundle": "^8.0",
+        "symfony/runtime": "^8.0",
+        "symfony/dotenv": "^8.0",
+        "symfony/yaml": "^8.0",
+        "symfony/security-bundle": "^8.0",
+        "symfony/mercure-bundle": "^0.4",
+        "symfony/uid": "^8.0",
+        "doctrine/orm": "^3.0",
+        "doctrine/doctrine-bundle": "^3.0",
+        "doctrine/doctrine-migrations-bundle": "^4.0",
+        "php-qml/bridge": "@dev"
+    },
+    "require-dev": {
+        "symfony/maker-bundle": "^1.62"
+    },
+    "autoload": {
+        "psr-4": {
+            "App\\": "src/"
+        }
+    },
+    "config": {
+        "allow-plugins": {
+            "symfony/runtime": true
+        }
+    },
+    "extra": {
+        "runtime": {
+            "class": "Symfony\\Component\\Runtime\\SymfonyRuntime"
+        }
+    },
+    "repositories": [
+        {
+            "type": "path",
+            "url": "../../../framework/php",
+            "options": {
+                "symlink": true
+            }
+        }
+    ]
+}