feat(vqt6): 新增 ViperQtProject Qt6 Hello World 测试工程

- project.vpj: 静态链接 libvqt6_bridge.a，链接 Qt6.11.2 MinGW 动态库（Core/Gui/Widgets/Network）
- App/main.vp: QApplication + QWidget + QLabel + QPushButton 测试，FFI 摆放子控件几何

ViperQtProject/App/main.vp

@@ -0,0 +1,33 @@
+# main.vp — ViperQtProject：vqt6 Qt6 GUI Hello World 测试
+#
+# 构建需 project.vpj：
+#   - 静态链接 ../includes/vqt6/build/lib/libvqt6_bridge.a
+#   - 链接 Qt6 动态库（-L D:/Qt/6.11.2/mingw_64/lib -lQt6Core/Gui/Widgets/Network）
+#
+# 注意：
+#   - QApplication(argv) 的 argv 被包装层忽略（桥接层提供虚拟 argv），
+#     这里传 t.CPtr(0)（null 指针）即可（TPV 不支持列表字面量）。
+#   - 高层包装 QLabel/QPushButton 未提供 move/setGeometry，直接调 FFI 摆放几何。
+import t
+import vqt6
+
+
+def main() -> int:
+    # 1. QApplication（argv 被忽略，桥接层提供虚拟 argv）
+    app = vqt6.QApplication(t.CPtr(0))
+
+    # 2. 主窗口
+    win = vqt6.QWidget()
+    win.setWindowTitle("Viper Qt6 Demo")
+    win.resize(640, 480)
+
+    # 3. 子控件（直接调 FFI 设置几何位置）
+    label = vqt6.QLabel("Hello from Viper + Qt6!", win)
+    vqt6.vqt6_qwidget_set_geometry(label._ptr, 20, 20, 400, 40)
+
+    btn = vqt6.QPushButton("Click Me", win)
+    vqt6.vqt6_qwidget_set_geometry(btn._ptr, 20, 70, 120, 36)
+
+    # 4. 显示并进入事件循环
+    win.show()
+    return app.exec()

ViperQtProject/project.vpj

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+{
+    "name": "ViperQtProject - Qt6 GUI Test",
+    "version": "1.0.0",
+    "source_dir": "./App",
+    "build_dir": "./.tpv_build",
+    "compiler": {
+        "cmd": "llc",
+        "flags": [
+            "-filetype=obj",
+            "-relocation-model=pic"
+        ]
+    },
+    "linker": {
+        "cmd": "clang++",
+        "flags": [
+            "-lmsvcrt",
+            "-lucrt",
+            "-lpthread",
+            "-lmingwex",
+            "-lkernel32",
+            "-Wl,--allow-multiple-definition",
+            "-lcomdlg32",
+            "-lcomctl32",
+            "-lole32",
+            "-luuid",
+            "-lwinmm",
+            "-lgdi32",
+            "-lgdiplus",
+            "-ladvapi32",
+            "-lshell32",
+            "-lws2_32",
+            "-luser32",
+            "-L D:/Qt/6.11.2/mingw_64/lib",
+            "-lQt6Core",
+            "-lQt6Gui",
+            "-lQt6Widgets",
+            "-lQt6Network"
+        ],
+        "static_libs": [
+            "../includes/vqt6/build/lib/libvqt6_bridge.a"
+        ],
+        "output": "app.exe"
+    },
+    "includes": [
+        "../includes"
+    ],
+    "target": {
+        "triple": "x86_64-pc-windows-gnu",
+        "datalayout": "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+    },
+    "options": {
+        "slice_level": 3,
+        "target": "llvm",
+        "strict_mode": true
+    }
+}