Locations manifest, reorganized instances settings

Shared/Settings/AdvancedSettings.swift

@@ -0,0 +1,57 @@
+import Defaults
+import SwiftUI
+
+struct AdvancedSettings: View {
+    @Default(.instancesManifest) private var instancesManifest
+    @Default(.showMPVPlaybackStats) private var showMPVPlaybackStats
+
+    var body: some View {
+        VStack(alignment: .leading) {
+            #if os(macOS)
+                advancedSettings
+                Spacer()
+            #else
+                List {
+                    advancedSettings
+                }
+                #if os(iOS)
+                .listStyle(.insetGrouped)
+                #endif
+            #endif
+        }
+        #if os(tvOS)
+        .frame(maxWidth: 1000)
+        #endif
+        .navigationTitle("Advanced")
+    }
+
+    @ViewBuilder var advancedSettings: some View {
+        Section(header: manifestHeader, footer: manifestFooter) {
+            TextField("URL", text: $instancesManifest)
+        }
+        .padding(.bottom, 4)
+
+        Section(header: SettingsHeader(text: "Debugging")) {
+            showMPVPlaybackStatsToggle
+        }
+    }
+
+    var manifestHeader: some View {
+        SettingsHeader(text: "Public Manifest")
+    }
+
+    var manifestFooter: some View {
+        Text("You can create your own locations manifest and set its URL here to replace the built-in one")
+            .foregroundColor(.secondary)
+    }
+
+    var showMPVPlaybackStatsToggle: some View {
+        Toggle("Show MPV playback statistics", isOn: $showMPVPlaybackStats)
+    }
+}
+
+struct AdvancedSettings_Previews: PreviewProvider {
+    static var previews: some View {
+        AdvancedSettings()
+    }
+}