[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/deployment.yaml

@@ -0,0 +1,10 @@
+id: deployment
+name: Deployment
+tags:
+- fundamental
+- core-object
+- workload
+short-description: |
+  An API object that manages a replicated application.
+long-description: |
+  Each replica is represented by a [Pod](#term-pod), and the Pods are distributed among the nodes of a cluster.