Add support for IntelliJ IDEA 2025.3

[siropkin]

Summary

• Add support for IntelliJ IDEA 2025.3 (build 253.*)
• Bump plugin version to 1.4.7
• Add CLAUDE.md for project documentation
• Add .claude to .gitignore

Closes

• Closes Compatibility with 2025.3 IDEs #47
• Closes Intellij IDEA 2025.3.x support #49

🤖 Generated with Claude Code

[github-actions]

Qodana Community for JVM

It seems all right 👌

No new problems were found according to the checks applied

💡 Qodana analysis was run in the pull request mode: only the changed files were checked

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• Register at Qodana Cloud and configure the action
• Use GitHub Code Scanning with Qodana
• Host Qodana report at GitHub Pages
• Inspect and use qodana.sarif.json (see the Qodana SARIF format for details)

To get *.log files or any other Qodana artifacts, run the action with upload-result option set to true,
so that the action will upload the files as the job artifacts:

      - name: 'Qodana Scan'
        uses: JetBrains/qodana-action@v2024.2.5
        with:
          upload-result: true

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