v0.1.0

Add GitHub Actions and document Linux release flow

Add GitHub Actions workflows for continuous integration and tagged Linux releases. The CI workflow now runs cargo test on pushes and pull requests, while the release workflow builds a Linux release binary, packages documentation, uploads an artifact, and publishes a GitHub release asset for v* tags. Update the English and Chinese README files to document Linux-only support, local installation, GitHub release downloads, versioning, and the expected release process.

新增 GitHub Actions 工作流，用于持续集成和基于 tag 的 Linux 发版。CI 工作流会在 push 和 pull request 时自动运行 cargo test；release 工作流会构建 Linux release 二进制，打包文档，上传 artifact，并在推送 v* tag 时发布 GitHub Release 附件。同时更新中英文 README，补充仅支持 Linux、本地安装方式、从 GitHub Releases 下载二进制、版本规则以及标准发版流程等说明。