feat(chat): Classes added to chat select

lib/presentation/chat/chat_select_screen/bloc/chat_select_bloc.dart

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+import 'package:equatable/equatable.dart';
+import 'package:flutter/material.dart';
+import '/core/app_export.dart';
+import 'package:eatvio_app/presentation/chat/chat_select_screen/models/chat_select_model.dart';
+part 'chat_select_event.dart';
+part 'chat_select_state.dart';
+
+/// A bloc that manages the state of a ChatSelect according to the event that is dispatched to it.
+class ChatSelectBloc extends Bloc<ChatSelectEvent, ChatSelectState> {
+  ChatSelectBloc(ChatSelectState initialState) : super(initialState) {
+    on<ChatSelectInitialEvent>(_onInitialize);
+  }
+
+  _onInitialize(
+    ChatSelectInitialEvent event,
+    Emitter<ChatSelectState> emit,
+  ) async {
+    emit(state.copyWith(
+        chatSelectModelObj: state.chatSelectModelObj?.copyWith()));
+  }
+}

lib/presentation/chat/chat_select_screen/bloc/chat_select_event.dart

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+// ignore_for_file: must_be_immutable
+
+part of 'chat_select_bloc.dart';
+
+/// Abstract class for all events that can be dispatched from the
+///ChatSelect widget.
+///
+/// Events must be immutable and implement the [Equatable] interface.
+@immutable
+abstract class ChatSelectEvent extends Equatable {}
+
+/// Event that is dispatched when the ChatSelect widget is first created.
+class ChatSelectInitialEvent extends ChatSelectEvent {
+  @override
+  List<Object?> get props => [];
+}
+
+///event for dropdown selection
+class ChangeDropDownEvent extends ChatSelectEvent {
+  ChangeDropDownEvent({required this.value});
+
+  SelectionPopupModel value;
+
+  @override
+  List<Object?> get props => [
+        value,
+      ];
+}

lib/presentation/chat/chat_select_screen/bloc/chat_select_state.dart

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+// ignore_for_file: must_be_immutable
+
+part of 'chat_select_bloc.dart';
+
+/// Represents the state of ChatSelect in the application.
+class ChatSelectState extends Equatable {
+  ChatSelectState({
+    this.selectedDropDownValue,
+    this.chatSelectModelObj,
+  });
+
+  SelectionPopupModel? selectedDropDownValue;
+
+  ChatSelectModel? chatSelectModelObj;
+
+  @override
+  List<Object?> get props => [
+        selectedDropDownValue,
+        chatSelectModelObj,
+      ];
+  ChatSelectState copyWith({
+    SelectionPopupModel? selectedDropDownValue,
+    ChatSelectModel? chatSelectModelObj,
+  }) {
+    return ChatSelectState(
+      selectedDropDownValue:
+          selectedDropDownValue ?? this.selectedDropDownValue,
+      chatSelectModelObj: chatSelectModelObj ?? this.chatSelectModelObj,
+    );
+  }
+}