Add function documentation in `Sudoku.java` (#5532)

* Add function documentation and parameterized tests to Sudoku.java

* Update directory

* Update directory

* Fix clang format errors

* Change

* Fix

* Fix

* Fix

* Fix

* Fix

* Fix

* Fix

* Remove extra line

* Change values

* Fix

* Remove test

* Update directory

* Small comment fix

* Add comment

* Generalize comment

* Fix comment

* Update directory

* Fix comment

* Add changes suggested

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Co-authored-by: Hardvan <Hardvan@users.noreply.github.com>