chore: ignore install artifacts and clean SKILL.md frontmatter (#30)

- .gitignore: ignore skills-lock.json and .skills.json produced by npx skills add
- SKILL.md: drop inline comments on allowed-tools (valid YAML cleanup)
- README: use 'npx skills add' without --skill (root SKILL.md is auto-discovered)

Rebased onto current main; the Dart/Flutter guide from #31 is preserved.

.gitignore

@@ -24,5 +24,7 @@ build/
 .env
 .env.local
 
-# npx skills / agent local install artifacts
+# Skill install artifacts (created by `npx skills add`)
 .agents/
+skills-lock.json
+.skills.json

README.md

@@ -336,7 +336,7 @@ code-review-skill/
 **Install with `npx skills` (Cursor, Claude Code, Codex, OpenCode, and other agents):**
 
 ```bash
-npx skills add awesome-skills/code-review-skill --skill code-review-skill
+npx skills add awesome-skills/code-review-skill
 ```
 
 The skills CLI finds `SKILL.md` at the repo root. Do not nest this skill under `skills/`.
@@ -636,7 +636,7 @@ code-review-skill/
 **使用 `npx skills` 安装（Cursor、Claude Code、Codex、OpenCode 及其他 Agent）：**
 
 ```bash
-npx skills add awesome-skills/code-review-skill --skill code-review-skill
+npx skills add awesome-skills/code-review-skill
 ```
 
 skills CLI 会发现仓库根目录的 `SKILL.md`。不要把本技能嵌套到 `skills/` 目录下。

SKILL.md

@@ -13,8 +13,8 @@ allowed-tools:
   - Read
   - Grep
   - Glob
-  - Bash      # 运行 lint/test/build 命令验证代码质量
-  - WebFetch  # 查阅最新文档和最佳实践
+  - Bash
+  - WebFetch
 ---
 
 # Code Review Skill