fix(core): replace star imports with single class imports

Author: sam0r040

springwolf-core/src/main/java/io/github/stavshamir/springwolf/schemas/example/ExampleJsonGenerator.java

@@ -4,15 +4,26 @@
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.BooleanNode;
+import com.fasterxml.jackson.databind.node.DoubleNode;
+import com.fasterxml.jackson.databind.node.IntNode;
+import com.fasterxml.jackson.databind.node.JsonNodeFactory;
+import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.fasterxml.jackson.databind.util.RawValue;
 import io.swagger.v3.core.util.Json;
 import io.swagger.v3.oas.models.media.Schema;
 import io.swagger.v3.oas.models.media.StringSchema;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
-import com.fasterxml.jackson.databind.node.*;
-import java.util.*;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
 
 import static io.github.stavshamir.springwolf.configuration.properties.SpringwolfConfigConstants.SPRINGWOLF_SCHEMA_EXAMPLE_GENERATOR;