feat(main): 메인 탭 화면을 추가한다

SodaLive/Sources/V2/Main/MainTabBarButton.swift

@@ -0,0 +1,45 @@
+//
+//  MainTabBarButton.swift
+//  SodaLive
+//
+
+import SwiftUI
+
+struct MainTabBarButton: View {
+    let tab: MainTab
+    let isSelected: Bool
+    let width: CGFloat
+    let action: () -> Void
+
+    var body: some View {
+        Button(action: action) {
+            VStack(spacing: 4) {
+                ZStack(alignment: .center) {
+                    Image(isSelected ? tab.selectedIconName : tab.unselectedIconName)
+                }
+                .frame(height: 24)
+
+                Text(tab.title)
+                    .appFont(.caption3)
+                    .foregroundColor(isSelected ? Color.white : Color.gray600)
+                    .frame(height: 12, alignment: .bottom)
+            }
+            .frame(width: width, alignment: .center)
+            .frame(minHeight: 50)
+            .contentShape(Rectangle())
+        }
+        .buttonStyle(.plain)
+    }
+}
+
+struct MainTabBarButton_Previews: PreviewProvider {
+    static var previews: some View {
+        MainTabBarButton(
+            tab: .home,
+            isSelected: true,
+            width: UIScreen.main.bounds.width / 4,
+            action: {}
+        )
+        .background(Color.black)
+    }
+}