Issue #2377: The repository code has been refactored to use the recor…

[MugheesQasim]

…d class

Pull request description

• The immutable classes are replaced with the record classes (Java 16)
• There are some other classes in the codebase which have private final fields but I was not sure whether converting them to record classes would provide any significant benefit

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

87.9% Coverage
0.0% Duplication

[iluwatar]

Looks good! Thank you for the contribution 🎉

[iluwatar]

@all-contributors please add @MugheesQasim for code

[allcontributors]

@iluwatar

I've put up a pull request to add @MugheesQasim! 🎉