feat: users 테이블에 일반 로그인 아이디 패스워드 방식의 칼럼 추가

server/src/main/java/sallange/server/entity/User.java

@@ -26,6 +26,8 @@ public class User extends BaseDate {
 
     @Column(name = "oauth_id")
     private Long oAuthId;
+    private String loginId;
+    private String encryptedPassword;
     private Integer leftRentCount;
 
     public User(final Long id, final String name, final OAuthProvider oAuthProvider, final Long oAuthId, final Integer leftRentCount) {

server/src/main/resources/db/migration/V2__add_login_column.sql

@@ -0,0 +1,5 @@
+alter table users
+    add `login_id` varchar(255);
+
+alter table users
+    add `encrypted_password` varchar(255);