Feat: Basic structure for Council domain

src/main/kotlin/com/wafflestudio/csereal/core/council/api/v2/CouncilController.kt

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+package com.wafflestudio.csereal.core.council.api.v2
+
+import com.wafflestudio.csereal.core.council.service.CouncilService
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+@RequestMapping("/api/v2/council")
+class CouncilController(
+    private val councilService: CouncilService
+) {
+    // ...
+}

src/main/kotlin/com/wafflestudio/csereal/core/council/database/CouncilEntity.kt

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+package com.wafflestudio.csereal.core.council.database
+
+import com.wafflestudio.csereal.common.config.BaseTimeEntity
+import jakarta.persistence.Entity
+
+@Entity(name = "council")
+class CouncilEntity(
+    // ...
+) : BaseTimeEntity() {
+    // ...
+}

src/main/kotlin/com/wafflestudio/csereal/core/council/database/CouncilRepository.kt

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+package com.wafflestudio.csereal.core.council.database
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface CouncilRepository : JpaRepository<CouncilEntity, Long> {
+    // ...
+}

src/main/kotlin/com/wafflestudio/csereal/core/council/dto/CouncilDto.kt

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+package com.wafflestudio.csereal.core.council.dto
+
+import java.time.LocalDateTime
+
+data class CouncilDto(
+    val id: Long,
+    val createdAt: LocalDateTime?,
+    val modifiedAt: LocalDateTime?
+    // ...
+)

src/main/kotlin/com/wafflestudio/csereal/core/council/service/CouncilService.kt

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+package com.wafflestudio.csereal.core.council.service
+
+import com.wafflestudio.csereal.core.council.database.CouncilRepository
+import org.springframework.stereotype.Service
+
+@Service
+class CouncilService(
+    private val councilRepository: CouncilRepository
+) {
+    // ...
+}