[EA3-78] feat : 스터디 게시판 카테고리 생성

Author: endorsement0912

src/main/java/grep/neogul_coder/domain/studypost/Category.java

@@ -0,0 +1,19 @@
+package grep.neogul_coder.domain.studypost;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+@Schema(description = "카테고리: NOTICE(공지), FREE(자유)")
+public enum Category {
+  NOTICE("공지"),
+  FREE("자유");
+
+  private final String korean;
+
+  Category(String korean) { this.korean = korean; }
+
+  @JsonValue
+  public String toJson() {
+    return korean;
+  }
+}