feat(#359): Refactor `JavaParserMethod` Class

[volodya-lombrozo]

In this PR I significantly refactored JavaParserMethod by simplifying most of the method implementations.

Closes: #359, #360. History:

• feat(#359): significantly simplify the implementation if JavaParserMethod
• feat(#359): remove puzzles for #359 and #360 isses
• feat(#359): try to simplify 'statements' method
• feat(#359): fix all the qulice suggestions

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PR-Codex overview

This PR updates the code coverage ratio limit in pom.xml and refactors the flatStatements method in JavaParserMethod.java.

Detailed summary

• Updated code coverage ratio limit in pom.xml from 0.76 to 0.75
• Refactored flatStatements method in JavaParserMethod.java for readability and maintainability

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[volodya-lombrozo]

@rultor merge

[rultor]

@rultor merge

@volodya-lombrozo OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@volodya-lombrozo Done! FYI, the full log is here (took me 17min)