[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;
       ...
   }
   }