Create documentation page with glossary of terms

[Mr-Geekman]

Before submitting (must do checklist)

• [x] Did you read the contribution guide?
• [x] Did you update the docs? We use Numpy format for all the methods and classes.
• [ ] Did you write any new necessary tests?
• [x] Did you update the CHANGELOG?

Proposed Changes

See #1349.

Closing issues

Closes #1349.

[codecov-commenter]

Codecov Report

:exclamation: No coverage uploaded for pull request base (docs-prototype@8670ae2). Click here to learn what that means. The diff coverage is n/a.

:exclamation: Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

@@                Coverage Diff                @@
##             docs-prototype    #1353   +/-   ##
=================================================
  Coverage                  ?   89.10%           
=================================================
  Files                     ?      204           
  Lines                     ?    12643           
  Branches                  ?        0           
=================================================
  Hits                      ?    11265           
  Misses                    ?     1378           
  Partials                  ?        0           

:mega: We’re building smart automated test selection to slash your CI/CD build times. Learn more

[github-actions[bot]]

🚀 Deployed on https://deploy-preview-1353--etna-docs.netlify.app