docs: Restructure documentation with separate contributing section

Author: cassava

docs/develop/cpp-guidelines.rst renamed to docs/contributing/cpp-guidelines.rst

@@ -0,0 +1,12 @@
+Creating a New Release
+======================
+
+In principle, creating a release is nothing more than adding a version
+tag for a particular commit. In practice, we want to provide more:
+
+1. Consistent and relevant documentation.
+2. A "blog" entry describing the release in approachable language.
+3. A "changelog" entry with detailed list of all changes.
+4. A new tag in the Read-The-Docs configuration.
+
+Providing these requires more work up-front.

docs/contributing/creating-a-new-release.rst

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+Creating a New Release
+======================
+
+This document is used for the development of Cloe and documents
+the current process for creating a release.
+
+