Added select server screen and add server screen

lib/widgets/custom_radio_toggle.dart

@@ -0,0 +1,65 @@
+import 'package:flutter/material.dart';
+
+class CustomRadioToggle extends StatelessWidget {
+  final String groupSelected;
+  final String value;
+  final String label;
+  final void Function(String) onTap;
+
+  const CustomRadioToggle({
+    Key? key,
+    required this.groupSelected,
+    required this.value,
+    required this.label,
+    required this.onTap,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Material(
+      borderRadius: BorderRadius.circular(30),
+      color: Colors.transparent,
+      child: InkWell(
+        onTap: () => onTap(value),
+        borderRadius: BorderRadius.circular(30),
+        child: Container(
+          padding: const EdgeInsets.symmetric(
+            horizontal: 15,
+            vertical: 5
+          ),
+          decoration: BoxDecoration(
+            color: groupSelected == value 
+              ? Theme.of(context).primaryColor
+              : Theme.of(context).primaryColor.withOpacity(0.05),
+            border: Border.all(
+              color: Theme.of(context).primaryColor
+            ),
+            borderRadius: BorderRadius.circular(30)
+          ),
+          child: Row(
+            children: [
+              if (groupSelected == value) ...[
+                const Icon(
+                  Icons.check,
+                  color: Colors.white,
+                  size: 18,
+                ),
+                const SizedBox(width: 10),
+              ],
+              Text(
+                label,
+                textAlign: TextAlign.center,
+                style: TextStyle(
+                  fontSize: 14,
+                  color: groupSelected == value
+                    ? Colors.white
+                    : null
+                ),
+              )
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}