Add examples project

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

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+import SwiftUI
+
+struct SearchUserView: View {
+    @EnvironmentObject var viewModel: SearchUserViewModel
+    @State var text = "ra1028"
+
+    var body: some View {
+        NavigationView {
+            VStack {
+                SearchUserBar(text: $text) {
+                    self.viewModel.search(name: self.text)
+                }
+
+                List(viewModel.users) { user in
+                    SearchUserRow(user: user)
+                        .tapAction { print(user) }
+                }
+                }
+                .navigationBarTitle(Text("Users"))
+        }
+    }
+}