Add ip info fetcher

lib/features/proxy/model/ip_info_entity.dart

@@ -0,0 +1,70 @@
+import 'package:dart_mappable/dart_mappable.dart';
+
+part 'ip_info_entity.mapper.dart';
+
+@MappableClass()
+class IpInfo with IpInfoMappable {
+  const IpInfo({
+    required this.ip,
+    required this.countryCode,
+    required this.region,
+    required this.city,
+    this.timezone,
+    this.asn,
+    this.org,
+  });
+
+  final String ip;
+  final String countryCode;
+  final String region;
+  final String city;
+  final String? timezone;
+  final String? asn;
+  final String? org;
+
+  static IpInfo fromIpInfoIoJson(Map<String, dynamic> json) {
+    return switch (json) {
+      {
+        "ip": final String ip,
+        "country": final String country,
+        "region": final String region,
+        "city": final String city,
+        "timezone": final String timezone,
+        "org": final String org,
+      } =>
+        IpInfo(
+          ip: ip,
+          countryCode: country,
+          region: region,
+          city: city,
+          timezone: timezone,
+          org: org,
+        ),
+      _ => throw const FormatException("invalid json"),
+    };
+  }
+
+  static IpInfo fromIpApiCoJson(Map<String, dynamic> json) {
+    return switch (json) {
+      {
+        "ip": final String ip,
+        "country_code": final String countryCode,
+        "region": final String region,
+        "city": final String city,
+        "timezone": final String timezone,
+        "asn": final String asn,
+        "org": final String org,
+      } =>
+        IpInfo(
+          ip: ip,
+          countryCode: countryCode,
+          region: region,
+          city: city,
+          timezone: timezone,
+          asn: asn,
+          org: org,
+        ),
+      _ => throw const FormatException("invalid json"),
+    };
+  }
+}