chore: migrate all .java files to kotlin

[wax911]

AniTrend Pull Request

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[github-actions]

Auto approved automated PR

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[codacy-production]

Not up to standards ⛔

🔴 Issues 4 high · 13 medium · 83 minor

Alerts:
⚠ 100 issues (≤ 0 issues of at least minor severity)

Results:
100 new issues

Category	Results
BestPractice	1 minor
Documentation	57 minor
ErrorProne	4 high
CodeStyle	24 minor
Complexity	13 medium 1 minor

View in Codacy

🟢 Metrics 3422 complexity · 540 duplication

Metric	Results
Complexity	3422
Duplication	540

View in Codacy

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