update logos on SimpleX info page for dark mode (#880)

apps/ios/Shared/Assets.xcassets/logo-light.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "logo-light.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "logo-light@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "logo-light@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

apps/ios/Shared/Views/Onboarding/SimpleXInfo.swift

@@ -10,13 +10,14 @@ import SwiftUI
 
 struct SimpleXInfo: View {
     @EnvironmentObject var m: ChatModel
+    @Environment(\.colorScheme) var colorScheme: ColorScheme
     @State private var showHowItWorks = false
     var onboarding: Bool
 
     var body: some View {
         GeometryReader { g in
             VStack(alignment: .leading) {
-                Image("logo")
+                Image(colorScheme == .light ? "logo" : "logo-light")
                     .resizable()
                     .aspectRatio(contentMode: .fit)
                     .frame(width: g.size.width * 0.7)