Make Internet Archive integration opt-in (#250)

* Make web archive integration opt-in

* Add toast message about web archive integration opt-in

* Improve wording for web archive setting

* Add toast admin

* Fix toast clear button visited styles

* Add test for redirect

* Improve wording

* Ensure redirects to same domain

* Improve wording

* Fix snapshot test

Co-authored-by: Sascha Ißbrücker <sascha.issbruecker@gmail.com>

bookmarks/migrations/0011_userprofile_web_archive_integration.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.6 on 2022-01-08 12:39
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookmarks', '0010_userprofile_bookmark_link_target'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='userprofile',
+            name='web_archive_integration',
+            field=models.CharField(choices=[('disabled', 'Disabled'), ('enabled', 'Enabled')], default='disabled', max_length=10),
+        ),
+    ]