adding in-tree glossary for definitions

Signed-off-by: Chris Hein <[email protected]>

Author: christopherhein

proposals/00_capn-glossary.md

@@ -0,0 +1,16 @@
+# Table of Contents
+
+This document inherits terms from [Cluster API
+Glossary](https://cluster-api.sigs.k8s.io/reference/glossary.html) to support
+definitions for the Cluster API Provider Nested implementation.
+
+[C](#c) | [S](#s)
+
+# C
+---
+
+<!-- Eventually this should migrate to the CAPI Glossary -->
+
+### CAPN
+
+Cluster API Provider Nested