Add Translation Disclaimer to Japanese docs page

Following the legal team and Japan team's recommendation as well as a localization best practice, we need to add a disclaimer to the new Japanese documentation page informing users that the English version should be considered the most up-to-date and source of truth in case of any discrepancies or doubts.

Disclaimer copy

EN:

This translation was created using AI-assisted translation and is provided for your convenience. Some content has not yet been reviewed by a human. Discrepancies between versions may exist due to translation delays. For the most current information, please refer to the [English language documentation] as it serves as the authoritative source.

JA:

正式なドキュメントは英語版であり、この日本語訳はAI支援翻訳により作成された参考用のものです。日本語訳の一部の内容は人間によるレビューがまだ行われていないため、翻訳のタイミングにより英語版との間に差異が生じることがあります。最新かつ正確な情報については、[英語版]をご参照ください。

JA-EN back translation:

The English version serves as the authoritative documentation, and this Japanese translation, created using AI-assisted translation, is for reference only. Some content in the Japanese translation has not yet been reviewed by a human. Any discrepancies between versions may exist due to translation delays. For the most current and accurate information, please refer to the [English language documentation].

What needs to be done:

• Partner with legal team on the verbiage of such disclaimer.
• Involve the JA team to localize it in a way that resonates in the best way possible for our JA audience
• Inform the TW team of this initiative so that they're aware and align.
• Ask Product Design team for assistance on designing it.
• Plan the implementation of the banner with engineering team
  • Sticky banner preferably following GitLab's design principles.
  • Take this need into the account in the Docs Global Gateway epic