init: mipu-open 对外开放项目统一管理仓库

- 添加 mipu-api 作为 git submodule (Claude Code Skill)
- 迁移 API 文档源文件到 docs/ 目录统一维护
- 添加 Gitea Actions 工作流：tag推送自动打包docs并发布Release
- Skill 运行时自动从 mipu-open Release 下载最新文档

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/08-01_itinerary.md

@@ -0,0 +1,76 @@
+<!-- mipuyun-api-doc: itinerary -->
+# Itinerary - 行程实体对象
+
+Itinerary 实体（行程组合信息，与实际响应字段一致）
+
+| **参数名称** | **类型** | **说明** |
+| --- | --- | --- |
+| outboundSegments | Array<[SegmentElement](08-03_segment-element.md)> | 去程航段列表：单程（OW）和往返（RT）场景均返回，按行程顺序排列 |
+| inboundSegments | Array<[SegmentElement](08-03_segment-element.md)> | 返程航段列表：仅往返（RT）场景返回，字段含义同 outboundSegments；单程（OW）场景为空数组 |
+| fares | Array<[FlightFare](08-02_flight-fare.md)> | 该行程下的可选票价方案列表，每个方案包含去程/回程的票价、税费、座位数、舱位类型及航班政策信息 |
+
+## 实体轮廓
+
+```json
+{
+  "outboundSegments": [
+    {
+      "index": 1,
+      "carrier": "VJ",
+      "flightNumber": "VJ884",
+      "operatingCarrier": "",
+      "operatingFlightnumber": "",
+      "originAirport": "BOM",
+      "destinationAirport": "SGN",
+      "departureTime": "202510270040",
+      "arrivalTime": "202510270705",
+      "departureTerminal": "",
+      "arrivalTerminal": "",
+      "stopCities": "",
+      "duration": 295,
+      "aircraftCode": "330",
+      "codeShare": false
+    }
+  ],
+  "inboundSegments": [
+    {
+      // 同 outboundSegments 结构
+    }
+  ],
+  "fares": [
+    {
+      "fareBasis": "",
+      "rtnFareBasis": "",
+      "fareFamily": "Lion Economy",
+      "rtnFareFamily": "Lion Promo",
+      "currency": "USD",
+      "bookingCode": "Y,Y",
+      "rtnBookingCode": "Y,Y",
+      "availableSeats": 7,
+      "rtnAvailableSeats": 2,
+      "flightPolicy": {
+        "airlineCode": "SL",
+        "fareFamilyType": "Lion Economy",
+        "description": "",
+        "freeAncillaryList": [
+          {
+            "categoryCode": "CabinBaggageOverheadLocker",
+            "segmentIndex": 1,
+            "paxType": "ADT",
+            "piece": 1,
+            "weight": 7,
+            "size": ""
+          }
+        ],
+        "refundRules": [],   // 预留字段，暂未提供
+        "changeRules": []    // 预留字段，暂未提供
+      },
+      "rtnFlightPolicy": {
+        // 同 flightPolicy 结构
+      }
+    }
+  ]
+}
+```
+
+> `RuleElement` 结构详见 [FlightPolicy](08-04_flight-policy.md)