Spin up Glossary for TODO group

[cjyabraham]

Adapt the CNCF Glossary and reskin it for TODO group.

Some notes:

• TODO GROUP isn't affiliate with CNCF and has its own brand, however, CNCF uses TODO Group all the time as a place to recommend new members learn about open source best practices
• We don't need a custom design for this, just adapt the CNCF Glossary skin to the TODO brand as best as possible while keeping the colors accessible (see #735)
• url can be ospoglossary.todogroup.org and glossary.todogroup.org
• i18n support is needed
• Site can be stored in https://github.com/todogroup/glossary
• Initial content can be found here

(cc @caniszczyk)

[GarethAcidWorks]

First draft done, working file is here

[cjyabraham]

First pass at this is done and team knows to reach out for additional support.