Made admin panel for models Announcement and Reaction

widget_quintupoltrobol/announcements/admin.py

 from django.contrib import admin
+from .models import Announcement, Reaction
 
-# Register your models here.
+class AnnouncementAdmin(admin.ModelAdmin):
+    model = Announcement
+
+class ReactionAdmin(admin.ModelAdmin):
+    model = Reaction
+
+admin.site.register(Announcement, AnnouncementAdmin)
+admin.site.register(Reaction, ReactionAdmin)
\ No newline at end of file