[feat] 영화 도메인, repository 추가

src/main/java/com/mookive/mookive_backend/movie/domain/entity/Movie.java

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+package com.mookive.mookive_backend.movie.domain.entity;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Movie {
+
+    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String title;
+    private String year;
+    private String director;
+    private String genre;
+    private String plot;
+
+    @Builder
+    public Movie(String title, String year, String director, String genre, String plot) {
+        this.title = title;
+        this.year = year;
+        this.director = director;
+        this.genre = genre;
+        this.plot = plot;
+    }
+}

src/main/java/com/mookive/mookive_backend/movie/domain/repository/MovieRepository.java

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+package com.mookive.mookive_backend.movie.domain.repository;
+
+import com.mookive.mookive_backend.movie.domain.entity.Movie;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface MovieRepository extends JpaRepository<Movie, Long> {
+
+    Movie findByTitle(String title);
+}