Add Japanese translations for `Faker::Sports::Football`.

[yamat47]

Motivation / Background

This Pull Request is created to add new locale data for Japanese football teams, players, coaches, competition names, and positions to this library.

Additional information

This change is based on existing English data, translated by contributors who are native Japanese speakers.

To ensure the accuracy and quality of the translation, it has been reviewed by multiple native speakers knowledgeable in soccer.

Checklist

Before submitting the PR make sure the following are checked:

• [x] This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
• [x] Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]
• [x] Tests are added or updated if you fix a bug, refactor something, or add a feature.
• [x] Tests and Rubocop are passing before submitting your proposed changes.

If you're proposing a new generator or locale:

• [ ] Double-check the existing generators documentation to make sure the new generator you want to add doesn't already exist.
• [ ] You've reviewed and followed the Contributing guidelines.