docs: unify and enhance project README structure and content

- Move language selection links in all three README files below the badges and project description
- Add brief one-line project description and useful related resource links near the top of each README
- Improve overall consistency of README structure between English, Simplified Chinese, and Traditional Chinese versions

Signed-off-by: appleboy <[email protected]>

Author: appleboy

README.md

@@ -1,11 +1,16 @@
 # CodeGPT
 
-**English** | [繁體中文](./README.zh-tw.md) | [简体中文](./README.zh-cn.md)
-
 [![Lint and Testing](https://github.com/appleboy/CodeGPT/actions/workflows/testing.yml/badge.svg?branch=main)](https://github.com/appleboy/CodeGPT/actions/workflows/testing.yml)
 [![codecov](https://codecov.io/gh/appleboy/CodeGPT/branch/main/graph/badge.svg)](https://codecov.io/gh/appleboy/CodeGPT)
 [![Go Report Card](https://goreportcard.com/badge/github.com/appleboy/CodeGPT)](https://goreportcard.com/report/github.com/appleboy/CodeGPT)
 
+A CLI tool written in [Go](https://go.dev) that generates git commit messages or provides code review summaries using ChatGPT AI (gpt-4o, gpt-4 model). It also automatically installs a [git prepare-commit-msg hook](https://git-scm.com/docs/githooks).
+
+- [繁體中文介紹][1]
+- [繁體中文影片][2]
+
+**English** | [繁體中文](./README.zh-tw.md) | [简体中文](./README.zh-cn.md)
+
 ![cover](./images/cover.png)
 
 ## Table of Contents
@@ -43,11 +48,6 @@
   - [Star History](#star-history)
   - [Reference](#reference)
 
-A CLI tool written in [Go](https://go.dev) that generates git commit messages or provides code review summaries using ChatGPT AI (gpt-4o, gpt-4 model). It also automatically installs a [git prepare-commit-msg hook](https://git-scm.com/docs/githooks).
-
-- [繁體中文介紹][1]
-- [繁體中文影片][2]
-
 [1]: https://blog.wu-boy.com/2023/03/writes-git-commit-messages-using-chatgpt/
 [2]: https://www.youtube.com/watch?v=4Yei_t6eMZU
 

README.zh-cn.md

@@ -1,11 +1,16 @@
 # CodeGPT
 
-[English](./README.md) | [繁體中文](./README.zh-tw.md) | **简体中文**
-
 [![Lint and Testing](https://github.com/appleboy/CodeGPT/actions/workflows/testing.yml/badge.svg?branch=main)](https://github.com/appleboy/CodeGPT/actions/workflows/testing.yml)
 [![codecov](https://codecov.io/gh/appleboy/CodeGPT/branch/main/graph/badge.svg)](https://codecov.io/gh/appleboy/CodeGPT)
 [![Go Report Card](https://goreportcard.com/badge/github.com/appleboy/CodeGPT)](https://goreportcard.com/report/github.com/appleboy/CodeGPT)
 
+一个用 [Go](https://go.dev) 编写的 CLI 工具，它使用 ChatGPT AI（gpt-4o，gpt-4 模型）为你编写 git 提交信息或提供代码审查摘要，并自动安装 [git prepare-commit-msg hook](https://git-scm.com/docs/githooks)。
+
+- [繁體中文介紹][1]
+- [繁體中文影片][2]
+
+[English](./README.md) | [繁體中文](./README.zh-tw.md) | **简体中文**
+
 ![cover](./images/cover.png)
 
 ## 目录
@@ -36,11 +41,6 @@
       - [安装 hook](#安装-hook)
       - [卸载 hook](#卸载-hook)
 
-一个用 [Go](https://go.dev) 编写的 CLI 工具，它使用 ChatGPT AI（gpt-4o，gpt-4 模型）为你编写 git 提交信息或提供代码审查摘要，并自动安装 [git prepare-commit-msg hook](https://git-scm.com/docs/githooks)。
-
-- [繁體中文介紹][1]
-- [繁體中文影片][2]
-
 [1]: https://blog.wu-boy.com/2023/03/writes-git-commit-messages-using-chatgpt/
 [2]: https://www.youtube.com/watch?v=4Yei_t6eMZU
 

README.zh-tw.md

@@ -1,11 +1,16 @@
 # CodeGPT
 
-[English](./README.md) | **繁體中文** | [简体中文](./README.zh-cn.md)
-
 [![Lint and Testing](https://github.com/appleboy/CodeGPT/actions/workflows/testing.yml/badge.svg?branch=main)](https://github.com/appleboy/CodeGPT/actions/workflows/testing.yml)
 [![codecov](https://codecov.io/gh/appleboy/CodeGPT/branch/main/graph/badge.svg)](https://codecov.io/gh/appleboy/CodeGPT)
 [![Go Report Card](https://goreportcard.com/badge/github.com/appleboy/CodeGPT)](https://goreportcard.com/report/github.com/appleboy/CodeGPT)
 
+一個用 [Go](https://go.dev) 編寫的 CLI 工具，使用 ChatGPT AI (gpt-4o, gpt-4 模型) 生成 git 提交訊息或提供代碼審查摘要。它還會自動安裝 [git prepare-commit-msg hook](https://git-scm.com/docs/githooks)。
+
+- [繁體中文介紹][1]
+- [繁體中文影片][2]
+
+[English](./README.md) | **繁體中文** | [简体中文](./README.zh-cn.md)
+
 ![cover](./images/cover.png)
 
 ## 目錄
@@ -43,11 +48,6 @@
   - [Star History](#star-history)
   - [參考資料（Reference）](#參考資料reference)
 
-一個用 [Go](https://go.dev) 編寫的 CLI 工具，使用 ChatGPT AI (gpt-4o, gpt-4 模型) 生成 git 提交訊息或提供代碼審查摘要。它還會自動安裝 [git prepare-commit-msg hook](https://git-scm.com/docs/githooks)。
-
-- [繁體中文介紹][1]
-- [繁體中文影片][2]
-
 [1]: https://blog.wu-boy.com/2023/03/writes-git-commit-messages-using-chatgpt/
 [2]: https://www.youtube.com/watch?v=4Yei_t6eMZU