feat : EventDetails : Back button + read more option

lib/ui/common/post_card_widget.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'dart:async';
+import 'package:readmore/readmore.dart';
 
 class PostCardWidget extends StatefulWidget {
   final String title;
@@ -105,9 +106,14 @@ class _PostCardWidgetState extends State<PostCardWidget> {
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
                 // Contenu
-                Text(
+                ReadMoreText(
                   widget.content,
-                  style: Theme.of(context).textTheme.bodyMedium?.copyWith(
+                  trimMode: TrimMode.Line,
+                  trimLines: 2,
+                  colorClickableText: Theme.of(context).colorScheme.primary,
+                  trimCollapsedText: 'Voir plus',
+                  trimExpandedText: 'Voir moins',
+                  moreStyle: Theme.of(context).textTheme.bodyMedium?.copyWith(
                     color: Colors.white,
                     height: 1.4,
                   ),