update README

[kxxt]

Replace the original README file in the template repo with a real README

[github-actions]

There are a few problems with this pull request, as well as some suggestions for improvement.

First, the title and body of the pull request do not provide enough information about the changes being made. The title should be a brief, clear summary of the changes, and the body should provide more detailed information about what has been changed and why.

Second, the diff included in the pull request only shows the changes made to the README.md file, but it is not clear what those changes are. It would be helpful to include a more detailed explanation of the changes in the body of the pull request, or to include a summary of the changes in the diff.

Additionally, the changes made to the README.md file in this pull request do not seem to be complete. The new README.md file is only 28 lines long, but the original file was 116 lines long. This suggests that important information may have been removed from the README.md file, and it is not clear what that information was.

Finally, it is not clear why the original README.md file was replaced with a new one. It would be helpful to provide more information about the motivation for these changes, and to explain how the new README.md file improves upon the original.

Overall, it would be helpful to provide more detailed information about the changes made in this pull request, and to explain the motivation for those changes. This will make it easier for others to review the pull request and understand the impact of the changes.