docs: add Aaron Iker as sponsor to all README files (#287)

Add Aaron Iker (@aaroniker) with GitHub and X links to the sponsors
section in all language README files (EN, KO, JA, ZH-CN).

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

README.ja.md

@@ -913,5 +913,6 @@ OpenCode が Debian / ArchLinux だとしたら、Oh My OpenCode は Ubuntu / [O
 ## スポンサー
 - **Numman Ali** [GitHub](https://github.com/numman-ali) [X](https://x.com/nummanali)
   - 最初のスポンサー
+- **Aaron Iker** [GitHub](https://github.com/aaroniker) [X](https://x.com/aaroniker)
 
 *素晴らしいヒーロー画像を作成してくれた [@junhoyeo](https://github.com/junhoyeo) に感謝します*

README.ko.md

@@ -907,5 +907,6 @@ OpenCode 를 사용하여 이 프로젝트의 99% 를 작성했습니다. 기능
 ## 스폰서
 - **Numman Ali** [GitHub](https://github.com/numman-ali) [X](https://x.com/nummanali)
   - 첫 번째 스폰서
+- **Aaron Iker** [GitHub](https://github.com/aaroniker) [X](https://x.com/aaroniker)
 
 *멋진 히어로 이미지를 만들어주신 히어로 [@junhoyeo](https://github.com/junhoyeo) 께 감사드립니다*

README.md

@@ -979,5 +979,6 @@ I have no affiliation with any project or model mentioned here. This is purely p
 ## Sponsors
 - **Numman Ali** [GitHub](https://github.com/numman-ali) [X](https://x.com/nummanali)
   - The first sponsor
+- **Aaron Iker** [GitHub](https://github.com/aaroniker) [X](https://x.com/aaroniker)
 
 *Special thanks to [@junhoyeo](https://github.com/junhoyeo) for this amazing hero image.*

README.zh-cn.md

@@ -912,5 +912,6 @@ Oh My OpenCode 送你重构工具（重命名、代码操作）。
 ## 赞助者
 - **Numman Ali** [GitHub](https://github.com/numman-ali) [X](https://x.com/nummanali)
   - 第一位赞助者
+- **Aaron Iker** [GitHub](https://github.com/aaroniker) [X](https://x.com/aaroniker)
 
 *感谢 [@junhoyeo](https://github.com/junhoyeo) 制作了这张超帅的 hero 图。*