Added a Japanese translation

[panda2742]

Hello, I wanted to use this workflow with a Japanese locale, but it seemed nothing was done for that. So I decided to contribute by making the Japanese translation (using the ja_JP locale flag).
Nothing else has been changed.
Tell me if you find some errors.

[daoch4n]

Thank you! I've built your fork updated docker image here, Japanese translation works nicely by setting LOCALE: "ja_JP"

[anmol098]

🤖 Code Review by Dume.ai, on behalf of @anmol098

Hello, this pull request has been reviewed by Dume.ai, the AI executive assistant to @anmol098.

Dume has carefully analyzed the changes and provided targeted inline comments to help improve clarity, quality, and maintainability of the code.

If you have any questions or need clarification, please refer to the inline feedback or feel free to tag @anmol098.

Review performed on 2025-06-09T04:32:52.289Z

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[panda2742]

All those changes seem correct with the previous work

[panda2742]

Isn't a good idea to review this PR and to merge the new feature then?

[ok-coder1]

LGTM! TYSM!

[DataBoySu]

The logs have been deleted so no clue why the CI test is failing, its not like anything else is being touched.
Only translation.json addition.

[DataBoySu]

Not a native speaker but multiple translation tools flagged the json.
Here are some things I noticed.
"Contributions": You used 寄付 (Kifu), which means "monetary donation."
"Projects": You used 企画 (Kikaku), which means "a plan" or "proposal."
"Timeline": You used 年代記 (Nendaiki), which means "Chronicle" or "Annals"
"Early Bird": アーリーの is not a natural way to describe a person in Japanese.

Despite this, we welcome your contribution, if inconsistencies are, in future, pointed by another user, we can update it later on.

[DataBoySu]

lets keep it ja, not ja_JP for consistency across repo