Add documentation on moving the myKV root node

docs/migrate-mykv-root.md

@@ -0,0 +1,24 @@
+Here's what was done to migrate the root page on preprod.mykv.ch, just for documentations sake
+
+```python
+
+from wagtail.models import Locale, Page, Site
+root = Page.objects.get(id=1)
+mykv=Page.objects.get(slug='my-kv')
+mykv.move(root, "first-child")
+
+localhost=Site.objects.get(is_default_site=True)
+localhost.root_page=mykv
+localhost.save()
+
+home=Page.objects.get(slug='home')
+home.delete()
+
+```
+
+```bash
+python manage.py migrate_translation --original kommunizieren-im-team --slug communicating-in-the-team --language en
+python manage.py migrate_translation --original kommunizieren-im-team --slug communiquer-au-sein-de-léquipe --language fr
+python manage.py migrate_translation --original zusammenarbeiten-im-team --slug collaborating-in-a-team --language en
+python manage.py migrate_translation --original zusammenarbeiten-im-team --slug collaborer-dans-une-équipe --language fr
+```