feat: 新增代码智能内置技能 (#61)

## 变更摘要

- 新增中英文 `code-intelligence` 内置技能，按需暴露隐藏的 `Lsp` 工具
- 记录 9 种语义导航操作、目录权限边界、缺少语言服务器时的降级策略
- 要求客户端版本 `10.0.94`，避免旧客户端安装后缺失工具
- 更新内置技能清单、市场统计和版本

## 验证

- `uv run --with httpx --with ruamel-yaml scripts/i18n/validate-i18n.py`
- `uv run --with httpx --with ruamel-yaml scripts/i18n/translate.py
--check`

## Summary

Adds the bilingual `code-intelligence` built-in skill, exposes the
hidden `Lsp` tool only when the skill is active, documents its
permission and fallback behavior, and updates the market manifest and
counts.

README.md

@@ -23,16 +23,16 @@ DesireCore 官方市场仓库，存放官方维护的 Agent/Skill 定义，以
 The market currently contains:
 
 - `1` Agent: `desirecore`
-- `30` local built-in skills with `SKILL.md`
+- `31` local built-in skills with `SKILL.md`
 - `22` external skill entries with `entry.json`
-- `52` publishable skills in total (`SKILL.md` + `entry.json`)
+- `53` publishable skills in total (`SKILL.md` + `entry.json`)
 
 ## Skill Sources
 
 Local built-in skills are installable from this repository and must be listed in `builtin-skills.json`:
 
 ```text
-configuring-compute, create-agent, dashscope-image-gen, delete-agent,
+code-intelligence, configuring-compute, create-agent, dashscope-image-gen, delete-agent,
 dev-environment-setup, discover-agent, docx, frontend-design, guizang-ppt,
 image-to-image, mail-operations, manage-skills, manage-teams, markdown,
 minimax-music-gen, minimax-video-gen, nodejs-runtime, pdf, pptx,