feat: 收录应用开发发布技能与双语示例 (#214)

## 中文

新增按需调用的内置技能 `app-developer`（应用开发与发布）：中英正文、sidecar、MIT 许可、静态与服务两个通用工作台示例，以及作者接口与分发参考，并登记进 `builtin-skills.json`。作者管理优先使用 AppManage 的有限动作，执行前须通过 `authoring_capabilities` 确认 `app-authoring-v1`，能力不可用时停止受影响的操作；外部 Node/Docker 运行时、托管、Git 服务与数据库的条款和可能费用已在发现文案、compatibility 与正文披露。另将 dev-environment-setup 探测参考中的三处用户 home 示例改为通用路径。

与 #220、#212 合入后的 main 解决 manifest 冲突：技能总数 144，市场版本 1.5.13。验证：catalog 与 i18n 校验 0 errors / 106 warnings（含新技能尚未 ref-bound review 的治理提醒），translate --check 与 git diff --check 通过；远端 validate、translate、CodeQL 通过。Copilot 因额度用尽未能审查。

## English

Add the on-demand builtin `app-developer` skill (application development and publishing): English/Chinese bodies, sidecar, MIT license, static and service workbench examples, plus authoring-interface and distribution references, registered in `builtin-skills.json`. Authoring prefers AppManage's finite actions and must confirm `app-authoring-v1` through `authoring_capabilities` first, stopping affected operations when the capability is unavailable. External Node/Docker runtime, hosting, Git service and database terms and possible costs are disclosed. Three user-home examples in the dev-environment-setup probe reference are neutralized.

The manifest conflict with main after #220 and #212 is resolved: 144 skills, market version 1.5.13. Catalog and i18n validation report 0 errors with 106 warnings (including the new skill's pending ref-bound review notice); translate --check and git diff --check pass; remote validate, translate and CodeQL passed. Copilot could not review because of its quota limit.

skills/dev-environment-setup/references/probe-snapshot.md

@@ -45,10 +45,10 @@ Windows 上 `wsl` 字段值类似 `{ "installed": true, "version": "2", "default
   "desirecore_api": "https://127.0.0.1:38291",
   "system_python": { "path": "/opt/homebrew/bin/python3", "version": "3.12.4" },
   "system_pip": { "path": "/opt/homebrew/bin/pip3", "version": "24.0" },
-  "hatch_path": "/Users/wangyi/.desirecore/runtime/hatch/hatch",
+  "hatch_path": "/Users/example/.desirecore/runtime/hatch/hatch",
   "hatch_version": "1.16.5",
   "hatch_versions": ["3.11", "3.12"],
-  "active_venv": "/Users/wangyi/proj/.venv",
+  "active_venv": "/Users/example/proj/.venv",
   "pep668": false,
   "pyenv_path": "",
   "conda_path": ""
@@ -70,7 +70,7 @@ Windows 上 `wsl` 字段值类似 `{ "installed": true, "version": "2", "default
   "desirecore_api": "https://127.0.0.1:38291",
   "system_node": { "path": "/opt/homebrew/bin/node", "version": "22.4.1" },
   "system_npm":  { "path": "/opt/homebrew/bin/npm",  "version": "10.8.1" },
-  "volta_path": "/Users/wangyi/.desirecore/runtime/volta/volta",
+  "volta_path": "/Users/example/.desirecore/runtime/volta/volta",
   "volta_version": "2.0.2",
   "volta_tools": {
     "node": ["22.4.1"],