[glossary] Glossary MVP (#4865)

* [glossary] Glossary MVP

* resolve conflict

* initial pass at includable glossary data

* tag to term mapping

* Change StatefulSets to singular, StatefulSet

* revise glossary style guide, move

* make descriptions plural

_includes/tag-map.md

@@ -0,0 +1,15 @@
+<!-- Use include_cached when incorporating this file, in order to reduce computation/build time -->
+
+{% assign glossary_terms = site.data.glossary | where_exp: "term", "term.id != '_example'" %}
+
+{% assign tag_map = "" | split: " " %}
+
+{% for tag in site.data.canonical-tags %}
+
+{% assign term_list = glossary_terms | where_exp:"term", "term.tags contains tag" | map: "id" %}
+
+{% assign tag_obj = "" | split: " " | push: tag | push: term_list %}
+
+{% assign tag_map = tag_map | push: tag_obj %}
+
+{% endfor %}