docs(docs): Add DeepWiki badge to documentation

- Include a link to DeepWiki in README files for increased visibility.
- This addition helps users quickly access more information about the AI commit message generator.
- The badge appears in the English, Japanese, Simplified Chinese, and Traditional Chinese README files.

Author: ityaozm@gmail.com

README-ja.md

@@ -9,6 +9,7 @@
 
 > Automagically generate conventional git commit message with AI. - 使用 AI 自动生成约定式 git 提交信息。
 
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/guanguans/ai-commit)
 [![tests](https://github.com/guanguans/ai-commit/workflows/tests/badge.svg)](https://github.com/guanguans/ai-commit/actions)
 [![check & fix styling](https://github.com/guanguans/ai-commit/actions/workflows/php-cs-fixer.yml/badge.svg)](https://github.com/guanguans/ai-commit/actions)
 [![codecov](https://codecov.io/gh/guanguans/ai-commit/branch/main/graph/badge.svg?token=URGFAWS6S4)](https://codecov.io/gh/guanguans/ai-commit)

README-zh_CN.md

@@ -1,4 +1,4 @@
-# ai-commit
+# ai-commit 
 
 [//]: # (https://looka.com)
 
@@ -9,6 +9,7 @@
 
 > Automagically generate conventional git commit message with AI. - 使用 AI 自动生成约定式 git 提交信息。
 
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/guanguans/ai-commit)
 [![tests](https://github.com/guanguans/ai-commit/workflows/tests/badge.svg)](https://github.com/guanguans/ai-commit/actions)
 [![check & fix styling](https://github.com/guanguans/ai-commit/actions/workflows/php-cs-fixer.yml/badge.svg)](https://github.com/guanguans/ai-commit/actions)
 [![codecov](https://codecov.io/gh/guanguans/ai-commit/branch/main/graph/badge.svg?token=URGFAWS6S4)](https://codecov.io/gh/guanguans/ai-commit)

README-zh_TW.md

@@ -9,6 +9,7 @@
 
 > Automagically generate conventional git commit message with AI. - 使用 AI 自动生成约定式 git 提交信息。
 
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/guanguans/ai-commit)
 [![tests](https://github.com/guanguans/ai-commit/workflows/tests/badge.svg)](https://github.com/guanguans/ai-commit/actions)
 [![check & fix styling](https://github.com/guanguans/ai-commit/actions/workflows/php-cs-fixer.yml/badge.svg)](https://github.com/guanguans/ai-commit/actions)
 [![codecov](https://codecov.io/gh/guanguans/ai-commit/branch/main/graph/badge.svg?token=URGFAWS6S4)](https://codecov.io/gh/guanguans/ai-commit)

README.md

@@ -9,6 +9,7 @@
 
 > Automagically generate conventional git commit message with AI. - 使用 AI 自动生成约定式 git 提交信息。
 
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/guanguans/ai-commit)
 [![tests](https://github.com/guanguans/ai-commit/workflows/tests/badge.svg)](https://github.com/guanguans/ai-commit/actions)
 [![check & fix styling](https://github.com/guanguans/ai-commit/actions/workflows/php-cs-fixer.yml/badge.svg)](https://github.com/guanguans/ai-commit/actions)
 [![codecov](https://codecov.io/gh/guanguans/ai-commit/branch/main/graph/badge.svg?token=URGFAWS6S4)](https://codecov.io/gh/guanguans/ai-commit)