Add examples project

Examples/Combine using GitHub API/SwiftUI-Combine-Example/SearchUserRow.swift

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+import SwiftUI
+
+struct SearchUserRow: View {
+    @EnvironmentObject var viewModel: SearchUserViewModel
+    @State var user: User
+
+    var body: some View {
+        HStack {
+            self.viewModel.userImages[user].map { image in
+                Image(uiImage: image)
+                    .frame(width: 44, height: 44)
+                    .aspectRatio(contentMode: .fit)
+                    .clipShape(Circle())
+                    .overlay(Circle().stroke(Color.gray, lineWidth: 1))
+            }
+
+            Text(user.login)
+                .font(Font.system(size: 18).bold())
+
+            Spacer()
+            }
+            .padding(EdgeInsets(top: 8, leading: 16, bottom: 8, trailing: 16))
+            .frame(height: 60)
+            .onAppear { self.viewModel.getImage(for: self.user) }
+    }
+}