Feature: consumption templates (#4196)

* Initial implementation of consumption templates

* Frontend implementation of consumption templates

Testing

* Support consumption template source

* order templates, automatically add permissions

* Support title assignment in consumption templates

* Refactoring, filters to and, show sources on list

Show sources on template list, update some translation strings

Make filters and

minor testing

* Update strings

* Only update django-multiselectfield

* Basic docs, document some methods

* Improve testing coverage, template multi-assignment merges

src/paperless_mail/migrations/0022_mailrule_assign_owner_from_rule_and_more.py

@@ -0,0 +1,34 @@
+# Generated by Django 4.1.11 on 2023-09-18 18:50
+
+from django.db import migrations
+from django.db import models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("paperless_mail", "0021_alter_mailaccount_password"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="mailrule",
+            name="assign_owner_from_rule",
+            field=models.BooleanField(
+                default=True,
+                verbose_name="Assign the rule owner to documents",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="mailrule",
+            name="assign_title_from",
+            field=models.PositiveIntegerField(
+                choices=[
+                    (1, "Use subject as title"),
+                    (2, "Use attachment filename as title"),
+                    (3, "Do not assign title from rule"),
+                ],
+                default=1,
+                verbose_name="assign title from",
+            ),
+        ),
+    ]