Add Japanese documentation(template.ja.mdx) for Knowledge API

[yagiyuki]

Self Checks

• I have searched for existing issues search for existing issues, including closed ones.
• I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
• [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:）
• Please do not modify this template :) and fill in all the required fields.

1. Is this request related to a challenge you're experiencing? Tell me about your story.

The Knowledge API documentation is currently not available in Japanese. On the other hand, the chat and workflow apps are already localized in Japanese and are easy to use for Japanese-speaking users. To improve accessibility and usability, I think the Knowledge API should also provide documentation in Japanese (template.ja.mdx).
https://github.com/langgenius/dify/tree/1fa66405c5e89acfbb031142e49ae2ffa5e67efb/web/app/(commonLayout)/datasets/template

2. Additional context or comments

#12247 (comment)

3. Can you help us with this feature?

• I am interested in contributing to this feature.

[dosubot]

Hi, @yagiyuki. I'm Dosu, and I'm helping the Dify team manage their backlog. I'm marking this issue as stale.

Issue Summary

• Request for Japanese documentation for the Knowledge API to improve accessibility.
• Other parts of the application are already localized in Japanese.
• You expressed willingness to contribute to this feature.
• No further comments or developments have been made.

Next Steps

• Is this issue still relevant to the latest version of the Dify repository? If so, please comment to keep the discussion open.
• If there are no updates, this issue will be automatically closed in 15 days.

Thank you for your understanding and contribution!

[yagiyuki]

Is this issue still relevant to the latest version of the Dify repository? If so, please comment to keep the discussion open.

The Japanese template is not available in the latest version. Therefore, we would like to keep this issue open.
https://github.com/langgenius/dify/tree/0.15.3/web/app/(commonLayout)/datasets/template

[dosubot]

@takatost, the user @yagiyuki has indicated that the Japanese template is still not available in the latest version and would like to keep this issue open. Could you please assist them with this request?