docs(glossary):updates and new terms for glossary

[barriebyron]

This PR is part of my learning, so feedback is most welcome and appreciated. This PR:

• adds new terms from Har Preet's Elesto ID research paper
• updates existing terms
• applies glossary standards, we want to use lower case for glossary entries unless the entry is a formal noun or industry standard

Consistency builds trust, so the effort for our vocabulary is well invested.

I'll build resources that will be helpful for the team to ensure consistency.

Planned: a word list that provides easy access to our spelling and capitalization conventions.