[docs][glossary] Add page that lists all standardized k8s terms (#5657)

* Add comprehensive glossary page

Additional Authors:
* Andrew Chen <chenopis@users.noreply.github.com>
* Steve Perry <steveperry-53@users.noreply.github.com>

* incorporate Tim's feedback

* address zach's comments

* address more comments

* add additional crosslinking

* Add platform developer, tweak formatting for disambiguation cases or multiparagraph definitions.

_data/glossary/cluster-architect.yaml

@@ -0,0 +1,12 @@
+id: cluster-architect
+name: Cluster Architect
+related:
+  - cluster
+  - cluster-operator
+tags:
+  - user-type
+short-description: |
+  A person who designs infrastructure that involves one or more Kubernetes clusters.
+
+long-description: |
+  Cluster architects are concerned with best practices for distributed systems, for example: high availability and security.