VACMS-20022: Creating GA4 term glossary for README.

[JakeBapple]

Description

Relates to #20022

Testing done

None needed.

QA steps

What needs to be checked to prove this works?
Make sure the readme is there.
What needs to be checked to prove it didn't break any related things?
What variations of circumstances (users, actions, values) need to be checked?

Definition of Done

• Documentation has been updated, if applicable.
• Tests have been added if necessary.
• Automated tests have passed.
• Code Quality Tests have passed.
• Acceptance Criteria in related issue are met.
• Manual Code Review Approved.
• If there are field changes, front end output has been thoroughly checked.

Select Team for PR review

• CMS Team
• Public websites
• Facilities
• User support
• Accelerated Publishing

[github-actions]

Checking composer.lock changes...

[github-actions]

Checking composer.lock changes...

[va-cms-bot]

Cypress Accessibility Violations

/test-data-dolorum

ID: button-name
Impact: critical
Tags: cat.name-role-value, wcag2a, wcag412, section508, section508.22.a, ACT, TTv5, TT6.a
Description: Ensures buttons have discernible text
Help: Buttons must have discernible text
Nodes:

• HTML: <button class="proofing-element-help" role="tooltip" data-proofing-help-title="About 'Page introduction' field" data-proofing-help="Add an introduction that helps visitors understand if information on the page is relevant to them."> <span aria-hidden="true">i</span> </button>
  Impact: critical
  Target: .field--name-field-intro-text-limited-html > .field__label > .proofing-element-help[role="tooltip"]
  Summary: Fix any of the following:
  Element does not have inner text that is visible to screen readers
  aria-label attribute does not exist or is empty
  aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
  Element has no title attribute
  Element's default semantics were not overridden with role="none" or role="presentation"

• HTML: <button class="proofing-element-help" role="tooltip" data-proofing-help-title="About 'Generate a table of contents from major headings' field" data-proofing-help="By checking this box, all h2's below this point on the page will be linked with with anchor links. This helps users navigate content on very long pages. Do not check this box unless there is at least 2 h2's on the page.">
  Impact: critical
  Target: .field--name-field-table-of-contents-boolean > .field__label > .proofing-element-help[role="tooltip"]
  Summary: Fix any of the following:
  Element does not have inner text that is visible to screen readers
  aria-label attribute does not exist or is empty
  aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
  Element has no title attribute
  Element's default semantics were not overridden with role="none" or role="presentation"

• HTML: <button class="proofing-element-help" role="tooltip" data-proofing-help-title="About 'Main content' field" data-proofing-help="The main body of the page, which appears below the featured content."> <span aria-hidden="true">i</span> </button>
  Impact: critical
  Target: button[data-proofing-help-title="About 'Main content' field"]
  Summary: Fix any of the following:
  Element does not have inner text that is visible to screen readers
  aria-label attribute does not exist or is empty
  aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
  Element has no title attribute
  Element's default semantics were not overridden with role="none" or role="presentation"