chore: 重构 OpenCode 命令和技能文档体系

- 新增：统一的 git 命令文档（add/commit/push/pull 等）
- 新增：整合的 Gitea 技能文档（API、运行器、工作流等）
- 新增：工作流模板（Android、Go、Node.js 等）
- 移除：已弃用的旧命令脚本和发布脚本
- 改进：.gitignore 添加敏感文件保护规则
- 改进：AGENTS.md 完善了开发规范和示例

此次重组统一了命令和技能的文档结构，便于后续维护和扩展。

command/git-status.md

@@ -0,0 +1,54 @@
+---
+description: Check git working directory status and file changes
+---
+
+# git-status
+
+Check current git repository status and display file changes in a clear format.
+
+## What It Does
+
+- Shows current branch
+- Lists changed files (unstaged and staged)
+
+## Steps
+
+Execute the following commands in parallel:
+
+```bash
+# Current branch
+git branch --show-current
+
+# Repository status
+git status
+
+# List changed files only
+echo "=== Unstaged Changes ==="
+git diff --name-only
+
+echo "=== Staged Changes ==="
+git diff --cached --name-only
+```
+
+## Output Format
+
+Present the information in Chinese with clear sections:
+
+```
+当前分支：main
+
+未暂存的文件 (3):
+- src/index.js
+- src/utils.js
+- README.md
+
+已暂存的文件 (2):
+- package.json
+- src/config.js
+```
+
+## Use Cases
+
+- Quick status check before committing
+- Review what files have changed
+- Check if you're on the correct branch