feat(workspaces): add thumbnail upload and lifecycle support

apps/workspaces/migrations/0006_workspace_thumbnail.py

@@ -0,0 +1,17 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("workspaces", "0005_remove_priceunit_priceunit_id_idx_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="workspace",
+            name="thumbnail",
+            field=models.ImageField(blank=True, null=True, upload_to="profile/workspaces/"),
+        ),
+    ]
+