split plugin dirs, created new cleaner import path for plugin config in settings.py

archivebox/builtin_plugins/singlefile/migrations/0001_initial.py

@@ -1,26 +0,0 @@
-# Generated by Django 5.1.1 on 2024-09-10 05:05
-
-from django.db import migrations
-
-
-class Migration(migrations.Migration):
-
-    initial = True
-
-    dependencies = [
-        ('core', '0074_alter_snapshot_downloaded_at'),
-    ]
-
-    operations = [
-        migrations.CreateModel(
-            name='SinglefileResult',
-            fields=[
-            ],
-            options={
-                'proxy': True,
-                'indexes': [],
-                'constraints': [],
-            },
-            bases=('core.archiveresult',),
-        ),
-    ]