feat: timeline post models

packages/flutter_timeline/lib/flutter_timeline.dart

@@ -1,5 +1,8 @@
 // SPDX-FileCopyrightText: 2023 Iconica
 //
 // SPDX-License-Identifier: BSD-3-Clause
-
+/// Flutter Timeline library
 library flutter_timeline;
+
+export 'package:flutter_timeline_interface/flutter_timeline_interface.dart';
+export 'package:flutter_timeline_view/flutter_timeline_view.dart';

packages/flutter_timeline_interface/lib/src/model/timeline_post.dart

@@ -0,0 +1,57 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_timeline_interface/src/model/timeline_reaction.dart';
+
+/// A post of the timeline.
+@immutable
+class TimelinePost {
+  const TimelinePost({
+    required this.id,
+    required this.creatorId,
+    required this.title,
+    required this.category,
+    required this.content,
+    required this.likes,
+    required this.reaction,
+    required this.createdAt,
+    required this.reactionEnabled,
+    this.likedBy,
+    this.reactions,
+    this.imageUrl,
+  });
+
+  /// The unique identifier of the post.
+  final String id;
+
+  /// The unique identifier of the creator of the post.
+  final String creatorId;
+
+  /// The title of the post.
+  final String title;
+
+  /// The category of the post on which can be filtered.
+  final String category;
+
+  /// The url of the image of the post.
+  final String? imageUrl;
+
+  /// The content of the post.
+  final String content;
+
+  /// The number of likes of the post.
+  final int likes;
+
+  /// The list of users who liked the post. If null it isn't loaded yet.
+  final List<String>? likedBy;
+
+  /// The number of reaction of the post.
+  final int reaction;
+
+  /// The list of reactions of the post. If null it isn't loaded yet.
+  final List<TimelinePostReaction>? reactions;
+
+  /// Post creation date.
+  final DateTime createdAt;
+
+  /// If reacting is enabled on the post.
+  final bool reactionEnabled;
+}

packages/flutter_timeline_interface/lib/src/model/timeline_reaction.dart

@@ -0,0 +1,27 @@
+import 'package:flutter/material.dart';
+
+@immutable
+class TimelinePostReaction {
+  const TimelinePostReaction({
+    required this.id,
+    required this.postId,
+    required this.creatorId,
+    required this.reaction,
+    required this.createdAt,
+  });
+
+  /// The unique identifier of the reaction.
+  final String id;
+
+  /// The unique identifier of the post on which the reaction is.
+  final String postId;
+
+  /// The unique identifier of the creator of the reaction.
+  final String creatorId;
+
+  /// The reactiontext
+  final String reaction;
+
+  /// Reaction creation date.
+  final DateTime createdAt;
+}