feat: Implement new sign in flow

lib/pages/sign_in/view_model/model/public_homeserver_data.dart

@@ -0,0 +1,79 @@
+class PublicHomeserverData {
+  final String? name;
+  final String? clientDomain;
+  final String? homepage;
+  final String? isp;
+  final String? staffJur;
+  final String? rules;
+  final String? privacy;
+  final bool? usingVanillaReg;
+  final String? description;
+  final String? regMethod;
+  final String? regLink;
+  final String? software;
+  final String? version;
+  final bool? captcha;
+  final bool? email;
+  final List<String>? languages;
+  final List<String>? features;
+  final int? onlineStatus;
+  final String? serverDomain;
+  final int? verStatus;
+  final int? roomDirectory;
+  final bool? slidingSync;
+  final bool? ipv6;
+
+  PublicHomeserverData({
+    this.name,
+    this.clientDomain,
+    this.homepage,
+    this.isp,
+    this.staffJur,
+    this.rules,
+    this.privacy,
+    this.usingVanillaReg,
+    this.description,
+    this.regMethod,
+    this.regLink,
+    this.software,
+    this.version,
+    this.captcha,
+    this.email,
+    this.languages,
+    this.features,
+    this.onlineStatus,
+    this.serverDomain,
+    this.verStatus,
+    this.roomDirectory,
+    this.slidingSync,
+    this.ipv6,
+  });
+
+  factory PublicHomeserverData.fromJson(Map<String, dynamic> json) {
+    return PublicHomeserverData(
+      name: json['name'],
+      clientDomain: json['client_domain'],
+      homepage: json['homepage'],
+      isp: json['isp'],
+      staffJur: json['staff_jur'],
+      rules: json['rules'],
+      privacy: json['privacy'],
+      usingVanillaReg: json['using_vanilla_reg'],
+      description: json['description'],
+      regMethod: json['reg_method'],
+      regLink: json['reg_link'],
+      software: json['software'],
+      version: json['version'],
+      captcha: json['captcha'],
+      email: json['email'],
+      languages: List<String>.from(json['languages'] ?? []),
+      features: List<String>.from(json['features'] ?? []),
+      onlineStatus: json['online_status'],
+      serverDomain: json['server_domain'],
+      verStatus: json['ver_status'],
+      roomDirectory: json['room_directory'],
+      slidingSync: json['sliding_sync'],
+      ipv6: json['ipv6'],
+    );
+  }
+}