[java] Request to support: enumPropertyNaming / or case conversion - generated fromValue() to use equalsIgnoreCase().

Description

openapi: 3.0.0
Java client code generation for an enum defined to be flexible with respect to case:

    color:
      type: string
      maxLength: 10
      enum: [Red, RED, Blue, BLUE]
      example: RED

Will generates invalid code (that doesn't compile) of the form:

public enum ColorEnum {
RED("Red"),
RED("RED"),
BLUE("Blue"),
BLUE("BLUE");

Suggest a fix/enhancement

Two possible solutions:
(i) generate code that uses mixed/matching case for the enums. Example: public enum ColorEnum { Red("Red"), RED("RED"), Blue("Blue"), BLUE("BLUE"); ...

(ii) generate code where the .fromValue(String text) method is case insensitive using equalsIgnoreCase() instead of equals()

Example - code generated now:

public static ColorEnum fromValue(String text) {
  for (ColorEnum b : ColorEnum.values()) {
    if (String.valueOf(b.value).equals(text)) {
      return b;
    }
  }
  return null;
}

to - code that should be generated:

public static ColorEnum fromValue(String text) {
  for (ColorEnum b : ColorEnum.values()) {
    if (String.valueOf(b.value).equalsIgnoreCase(text)) {
      return b;
    }
  }
  return null;
}

Reproduce the issue with the supplied OpenAPI 3.0 schema and inspect the generated Java ColorEnum.fromValue() method. Trace the Java enum generation template or entry point; done means the generated enum compiles with case variants and its fromValue behavior matches the selected requirement, with a regression test if the project has one.