Initial checkin of Pika from heckimp

.gitlab/merge_request_templates/default.md

@@ -0,0 +1,15 @@
+Contribution guidelines:
+
+- Follow our coding style, which is mostly the GNU coding style
+  with some specificities: see [Coding Style](https://developer.pika.org/core/coding_style/).
+
+- Make sure no trailing spaces or tabs are left out.
+
+- Check the following option when making your request:
+  "*Allow commits from members who can merge to the target branch.*"
+
+- Enable the container registry for your repository by following this
+  documentation, but enabling the feature instead of disabling it
+  (unlike what the docs says, Container Registry is disabled by default
+  on our Gitlab instance):
+  https://docs.gitlab.com/ee/user/packages/container_registry/#disable-the-container-registry-for-a-project