Add Native JStachio support

[SentryMan]

Given the following jex controller

@Controller("/jstache")
public class RegularJstache {

  @Get("/hello")
  public HelloWorldZeroDependency hello() {
    Person rick = new Person("Rick", LocalDate.now().minusYears(70));
    Person morty = new Person("Morty", LocalDate.now().minusYears(14));
    Person beth = new Person("Beth", LocalDate.now().minusYears(35));
    Person jerry = new Person("Jerry", LocalDate.now().minusYears(35));
    return new HelloWorldZeroDependency("Hello alien", List.of(rick, morty, beth, jerry));
  }

  @Get("/helloRuntime")
  public HelloWorld helloRuntime() {
    Person rick = new Person("Rick", LocalDate.now().minusYears(70));
    Person morty = new Person("Morty", LocalDate.now().minusYears(14));
    Person beth = new Person("Beth", LocalDate.now().minusYears(35));
    Person jerry = new Person("Jerry", LocalDate.now().minusYears(35));
    return new HelloWorld("Hello alien", List.of(rick, morty, beth, jerry));
  }

  /*
   * Annotate the root model with an inline mustache template
   */
  @JStacheConfig(type = JStacheType.STACHE)
  @JStache(
      template =
          """
          {{#people}}
          {{message}} {{name}}! You are {{#ageInfo}}{{age}}{{/ageInfo}} years old!
          {{#-last}}
          That is all for now!
          {{/-last}}
          {{/people}}
          """)
  public record HelloWorldZeroDependency(String message, List<Person> people) implements AgeLambdaSupport {}

  public record Person(String name, LocalDate birthday) {}

  public record AgeInfo(long age, String date) {}

  public interface AgeLambdaSupport {
    @JStacheLambda
    default AgeInfo ageInfo(Person person) {
      long age = ChronoUnit.YEARS.between(person.birthday(), LocalDate.now());
      String date = person.birthday().format(DateTimeFormatter.ISO_DATE);
      return new AgeInfo(age, date);
    }
  }

  @JStache(
      template =
          """
          {{#people}}
          {{message}} {{name}}! You are {{#ageInfo}}{{age}}{{/ageInfo}} years old!
          {{#-last}}
          That is all for now!
          {{/-last}}
          {{/people}}
          """)
  public record HelloWorld(String message, List<Person> people) implements AgeLambdaSupport {}

}

this will be generated

@Generated("avaje-jex-generator")
@Component
public final class RegularJstache$Route implements Routing.HttpService {

  private final RegularJstache controller;

  public RegularJstache$Route(RegularJstache controller, Jsonb jsonb) {
    this.controller = controller;
  }

  @Override
  public void add(Routing routing) {
    routing.get("/jstache/hello", this::_hello);
    routing.get("/jstache/helloRuntime", this::_helloRuntime);
  }

  private void _hello(Context ctx) throws Exception {
    ctx.status(200);
    var result = controller.hello();
    if (result != null) {
      var content = HelloWorldZeroDependencyRenderer.of().execute(result);
      ctx.contentType("text/html").write(content);
    }
  }

  private void _helloRuntime(Context ctx) throws Exception {
    ctx.status(200);
    var result = controller.helloRuntime();
    if (result != null) {
      var content = JStachio.render(result);
      ctx.contentType("text/html").write(content);
    }
  }

}

Will resolve #566