Settings about section (#1041)

* Fixes #1011 - Add legal information screen in settings, move all settings related screens under Source/Screen/Settings
* Fix warnings after sliding sync api change

ElementX/Sources/Screens/Settings/LegalInformationScreen/LegalInformationScreenCoordinator.swift

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+//
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Combine
+import SwiftUI
+
+final class LegalInformationScreenCoordinator: CoordinatorProtocol {
+    private let viewModel = LegalInformationScreenViewModel()
+    
+    func toPresentable() -> AnyView {
+        AnyView(LegalInformationScreen(context: viewModel.context))
+    }
+}

ElementX/Sources/Screens/Settings/LegalInformationScreen/LegalInformationScreenModels.swift

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+//
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+enum LegalInformationScreenViewModelAction { }
+
+struct LegalInformationScreenViewState: BindableState { }
+
+enum LegalInformationScreenViewAction { }

ElementX/Sources/Screens/Settings/LegalInformationScreen/LegalInformationScreenViewModel.swift

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+//
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Combine
+import SwiftUI
+
+typealias LegalInformationScreenViewModelType = StateStoreViewModel<LegalInformationScreenViewState, LegalInformationScreenViewAction>
+
+class LegalInformationScreenViewModel: LegalInformationScreenViewModelType, LegalInformationScreenViewModelProtocol {
+    init() {
+        super.init(initialViewState: LegalInformationScreenViewState())
+    }
+}

ElementX/Sources/Screens/Settings/LegalInformationScreen/LegalInformationScreenViewModelProtocol.swift

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+//
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Combine
+
+@MainActor
+protocol LegalInformationScreenViewModelProtocol {
+    var context: LegalInformationScreenViewModelType.Context { get }
+}

ElementX/Sources/Screens/Settings/LegalInformationScreen/View/LegalInformationScreen.swift

@@ -0,0 +1,52 @@
+//
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import SwiftUI
+
+struct LegalInformationScreen: View {
+    @ObservedObject var context: LegalInformationScreenViewModel.Context
+    @Environment(\.openURL) private var openURL
+    
+    var body: some View {
+        Form {
+            Section {
+                Button(L10n.commonCopyright) {
+                    openURL(URL(staticString: "https://element.io/copyright"))
+                }
+                Button(L10n.commonAcceptableUsePolicy) {
+                    openURL(URL(staticString: "https://element.io/acceptable-use-policy-terms"))
+                }
+                Button(L10n.commonPrivacyPolicy) {
+                    openURL(URL(staticString: "https://element.io/privacy"))
+                }
+            }
+            .buttonStyle(.compoundForm(accessory: .navigationLink))
+            .compoundFormSection()
+        }
+        .compoundForm()
+        .navigationTitle(L10n.commonAbout)
+        .navigationBarTitleDisplayMode(.inline)
+    }
+}
+
+// MARK: - Previews
+
+struct LegalInformationScreen_Previews: PreviewProvider {
+    static let viewModel = LegalInformationScreenViewModel()
+    static var previews: some View {
+        LegalInformationScreen(context: viewModel.context)
+    }
+}