[FEATURE REQUEST] Utility builder's methods and ability to ignore annotations on the class fields

[peterlitvak]

There are a few features that would be nice to add to the generator.

1. An option to add a static builder() method in the enclosing class. e.g.:

public record RecordA(String fieldOne, String fieldTwo) {

    public static RecordABuilder builder() {
        return new RecordABuilder();
    } 

    public static final class RecordABuilder {
    ...
    }
}

This would make the creation of the instances read a bit more fluent, e.g.:

RecordA a = RecordA.builder().withFieldOne("").build();

vs.

RecordA a = RecordABuilder.aRecordA().withFieldOne("").build();

2. A copy constructor for the builder, e.g.:

public record RecordA(String fieldOne, String fieldTwo) {

    public static RecordABuilder builder() {
        return new RecordABuilder();
    }

    public static RecordABuilder builder(RecordA recordA) {
        return new RecordABuilder(recordA);
    }

    public static final class RecordABuilder {
        private String fieldOne;
        private String fieldTwo;

        private RecordABuilder() {
        }

        private RecordABuilder(RecordA recordA) {
            this.fieldOne = recordA.fieldOne();
            this.fieldTwo = recordA.fieldTwo();
        }
     ...
  }
}

This would allow writing code like this:

RecordA  a1 = RecordA.builder().withFieldOne("1").withFieldTwo("2").build();
RecordA a2 = RecordA.builder(a1).withFieldOne("xyz").build();

3. Ability to ignore annotations on the class fields for which a builder is created. At the moment, it will generate the following:

public record RecordA(@NotNull String fieldOne, @NotNull String fieldTwo) {
    public static final class RecordABuilder {
        private @NotNull String fieldOne;
        private @NotNull String fieldTwo;
        ...
   }
}