refactor: 重构文档结构和文件位置

docs: 添加Redis集成测试文档
docs: 添加ID生成器分析报告
docs: 添加自由布局和固定布局示例文档
test: 添加ID生成器单元测试
fix: 删除重复的前端文档文件

docs/test/linear-async-create.json

@@ -0,0 +1,15 @@
+{
+  "name": "linear-async",
+  "code": "linear_async_1",
+  "design_json": {
+    "name": "linear-async",
+    "executionMode": "async",
+    "nodes": [
+      { "id": "N1", "type": "http", "data": { "title": "A-GET", "api": { "method": "GET", "url": "https://httpbin.org/delay/1" } } },
+      { "id": "N2", "type": "http", "data": { "title": "B-UUID", "api": { "method": "GET", "url": "https://httpbin.org/uuid" } } }
+    ],
+    "edges": [
+      { "sourceNodeID": "N1", "targetNodeID": "N2" }
+    ]
+  }
+}