copilot plugin marketplace browse awesome-copilot - warning: templates not found

```
$ copilot --version
GitHub Copilot CLI 1.0.48.

$ copilot plugin marketplace list
✨ Included with GitHub Copilot:
◆ copilot-plugins (GitHub: github/copilot-plugins)
◆ awesome-copilot (GitHub: github/awesome-copilot)

$ copilot plugin marketplace browse awesome-copilot
Failed to browse marketplace: Failed to fetch GitHub marketplace github/awesome-copilot: Error: Command failed: git clone --depth 1 --progress https://github.com/github/awesome-copilot.git ...

Cloning into '/home/kenorb/snap/copilot-cli/39/.cache/copilot/marketplaces/github-awesome-copilot'...
warning: templates not found in /usr/share/git-core/templates
git: 'remote-https' is not a git command. See 'git --help'.

$ which copilot
/snap/bin/copilot
```

What I'm doing wrong?
Is it because copilot was installed from snap store?

在检查 `copilot --version` 和可用的 Git 命令后，使用通过 snap 安装的 `/snap/bin/copilot` 运行 `copilot plugin marketplace browse awesome-copilot`，重现该故障。调查报告中缺失的 `git remote-https` 和模板路径，然后验证 marketplace 浏览是否可以在没有警告或克隆错误的情况下完成。

由索引模型根据 Issue 内容生成。