add main menu interface

- MainMenu
 - ChatItem (Widget)
 - ChatFolder (Widget)
 - ChatFolders (Widget)
 - ColorTheme

client/lib/screens/mainMenu.dart

@@ -0,0 +1,59 @@
+import 'package:client/widgets/chatFoloders.dart';
+import 'package:client/widgets/chatItem.dart';
+import 'package:flutter/material.dart';
+
+class MainMenu extends StatelessWidget{
+  const MainMenu({Key ?key});
+
+  @override
+  Widget build(BuildContext context) {
+    final colors = Theme.of(context).colorScheme;
+    return Scaffold(
+        backgroundColor: colors.surface,
+        appBar: AppBar(
+          backgroundColor: colors.surfaceBright,
+          leading: IconButton(onPressed: () => print("Side menu"), icon: Icon(Icons.dehaze)),
+          title: Text("Potato messenger"),
+          actions: [
+            IconButton(onPressed: () => print('New'), icon: Icon(Icons.add)),
+            IconButton(onPressed:() => print("Search"), icon: Icon(Icons.search)),
+            
+          ],
+        ),
+        body: Column(
+          
+          children: [
+            ChatFoloders(),
+            Expanded(
+              child: SingleChildScrollView(
+                scrollDirection: Axis.vertical,
+                child: Column(
+                  children: [
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                    ChatItem(),
+                  ]
+                ),
+              ),
+            )
+          ],
+        ),
+        
+      );
+  }
+
+}