feat(content): 콘텐츠 전체보기 조회 정책을 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/api/content/overview/application/ContentOverviewQueryPolicy.kt

@@ -0,0 +1,38 @@
+package kr.co.vividnext.sodalive.v2.api.content.overview.application
+
+import kr.co.vividnext.sodalive.v2.api.content.overview.dto.ContentOverviewType
+
+data class ContentOverviewPage(
+    val page: Int,
+    val size: Int
+) {
+    val offset: Long = page.toLong() * size
+}
+
+class ContentOverviewQueryPolicy {
+    fun resolveType(type: String?): ContentOverviewType {
+        return ContentOverviewType.from(type)
+    }
+
+    fun createPage(page: Int?, size: Int?): ContentOverviewPage {
+        val resolvedPage = (page ?: DEFAULT_PAGE).coerceAtLeast(DEFAULT_PAGE)
+        val requestedSize = size ?: DEFAULT_SIZE
+        val resolvedSize = if (requestedSize < MIN_SIZE) DEFAULT_SIZE else minOf(requestedSize, MAX_SIZE)
+        return ContentOverviewPage(page = resolvedPage, size = resolvedSize)
+    }
+
+    fun <T> pageItems(items: List<T>, page: ContentOverviewPage): List<T> {
+        return items.take(page.size)
+    }
+
+    fun <T> hasNext(items: List<T>, page: ContentOverviewPage): Boolean {
+        return items.size > page.size
+    }
+
+    companion object {
+        const val DEFAULT_PAGE = 0
+        const val DEFAULT_SIZE = 20
+        const val MIN_SIZE = 20
+        const val MAX_SIZE = 50
+    }
+}