Added select server screen and add server screen

lib/functions/conversions.dart

@@ -0,0 +1,45 @@
+import 'package:intl/intl.dart';
+
+bool? convertFromIntToBool(int value) {
+  if (value == 1) {
+    return true;
+  }
+  else if (value == 0) {
+    return false;
+  }
+  else {
+    return null;
+  }
+}
+
+int? convertFromBoolToInt(bool value) {
+  if (value == true) {
+    return 1;
+  }
+  else if (value == false) {
+    return 0;
+  }
+  else {
+    return null;
+  }
+}
+
+double formatPercentage(double value) {
+  return (value * 100).truncateToDouble() / 100;
+}
+
+String intFormat(int value, String locale) {
+  final f = NumberFormat("#,###", locale);
+  return f.format(value);
+}
+
+List<Map<String, dynamic>> convertFromMapToList(Map<String, int> values) {
+  List<Map<String, dynamic>> items = [];
+  values.forEach((key, value) {
+    items.add({
+      "label": key,
+      "value": value
+    });
+  });
+  return items;
+}