feat(main): 메인 탭 화면을 추가한다

SodaLive/Sources/V2/Main/MainPlaceholderTabView.swift

@@ -0,0 +1,27 @@
+//
+//  MainPlaceholderTabView.swift
+//  SodaLive
+//
+
+import SwiftUI
+
+struct MainPlaceholderTabView: View {
+    let title: String
+
+    var body: some View {
+        ZStack {
+            Color.black
+                .ignoresSafeArea()
+
+            Text(title)
+                .appFont(size: 20, weight: .bold)
+                .foregroundColor(.white)
+        }
+    }
+}
+
+struct MainPlaceholderTabView_Previews: PreviewProvider {
+    static var previews: some View {
+        MainPlaceholderTabView(title: "홈")
+    }
+}