Add search publication page and fix category access

frontend/src/app/components/publication-list/publication-list.component.html

@@ -0,0 +1,16 @@
+@for(publication of publications$ | async; track publication) {
+    <a [routerLink]="['/publications/' + publication.id]" class="publication">
+        <img src="/pictures/{{ publication.illustrationId }}"/>
+        <div class="body">
+            <h1>{{publication.title}}</h1>
+            <h2>{{publication.description}}</h2>
+        </div>
+        <div class="footer">
+            <img src="/pictures/{{ publication.author.image }}" [matTooltip]="publication.author.name"/>
+            Publication posted by {{publication.author.name}}
+            <span class="publication-date">
+                ({{ publication.creationDate | date: 'short' : 'fr-Fr' }})
+            </span>
+        </div>
+    </a>
+}