feat: implement DeleteDiaryPersistenceAdapter

src/main/kotlin/me/daegyeo/maru/diary/adaptor/out/persistence/DeleteDiaryPersistenceAdapter.kt

@@ -0,0 +1,16 @@
+package me.daegyeo.maru.diary.adaptor.out.persistence
+
+import me.daegyeo.maru.diary.application.port.out.DeleteDiaryPort
+import org.springframework.stereotype.Component
+import kotlin.jvm.optionals.getOrNull
+
+@Component
+class DeleteDiaryPersistenceAdapter(private val diaryRepository: DiaryRepository) : DeleteDiaryPort {
+    override fun deleteDiary(diaryId: Long): Boolean {
+        val diary = diaryRepository.findById(diaryId).getOrNull()
+        return diary?.let {
+            diaryRepository.delete(it)
+            true
+        } ?: false
+    }
+}

src/main/kotlin/me/daegyeo/maru/diary/application/port/out/DeleteDiaryPort.kt

@@ -0,0 +1,5 @@
+package me.daegyeo.maru.diary.application.port.out
+
+fun interface DeleteDiaryPort {
+    fun deleteDiary(diaryId: Long): Boolean
+}