fill in record components in record declaration

[gayanper]

Process the record type declaration members and fill in the record components from the variable declaration into the jdt DOM.

package com.example;

public record Person(String name, int age) {
    
}

The record declaration should now have record components and syntax highlighting and variable name completion should work for record components also

[gayanper]

@mickaelistria Let me know what you think, it was easy than I thought and still doubt the fix because it was easy to implement ;)

[gayanper]

Also let me know if there are any javac conversion unit tests if I can update for this change @mickaelistria

[mickaelistria]

Thank you!