Add start of documentation documentation

We do meta

documentation.rst

@@ -0,0 +1,23 @@
+.. _documentation:
+
+Documentation
+=============
+
+Welcome to the meta section of our documentation where we document how to do documentation!
+
+Edit or add.  That's the primary instruction.  You can edit directly on `gitlab.com/agaric/documentation <https://gitlab.com/agaric/documentation>` (for example, the edit link on this page takes you to `gitlab.com/agaric/documentation/blob/master/documentation.rst <https://gitlab.com/agaric/documentation/blob/master/documentation.rst>`).  If you aren't a member of Agaric, GitLab will helpfully offer to fork the documentation to your own namespace so that you can make a merge request with your documentation suggestion.
+
+.. note::
+    This documentation page is a good one to copy or refer to as an example for ReStructuredText formatting.  And of course
+
+anyone can come and clean up formatting later.
+
+Principles
+----------
+
+* Document closest to where people work:
+   * In README.md files or otherwise in the code repository for developers, .
+* Abstract and link here
+
+.. note::
+    In documentation we are living our `values <>` of encouraging continuous learning, appreciating new ideas, giving back to the communities we are part of, and valuing long-term relationships.