Add GSP project manifest and design layout

examples/lottery/README.md

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+# Lottery GSP Example
+
+这是一个 GSP 示例工程。
+
+## 结构
+
+```text
+lottery/
+  gsp.manifest
+  design/
+    *.gsp
+```
+
+## 入口
+
+```text
+page.lottery.main
+```
+
+## 生成
+
+从仓库根目录执行：
+
+```powershell
+.\bin\gsp.exe validate --root examples\lottery
+.\bin\gsp.exe flatten page.lottery.main --root examples\lottery --depth -1
+.\bin\gsp.exe graph page.lottery.main --root examples\lottery --format mermaid
+```

examples/lottery/gsp.manifest

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+gspVersion: 0.1
+toolkitVersion: 0.1
+project: lottery-example
+
+entry:
+  - page.lottery.main
+
+scan:
+  - design
+
+stageRules:
+  design:
+    minResolution: L0
+  integrate:
+    minResolution: L2
+  implement:
+    minResolution: L3
+  bind:
+    minResolution: L4
+  release:
+    minResolution: L5
+
+types:
+  - note
+  - concept
+  - style
+  - system
+  - feature
+  - mechanic
+  - flow
+  - page
+  - ui
+  - interaction
+  - feedback
+  - motion
+  - visual
+  - audio
+  - haptic
+  - binding