Complete Onboarding Slides Rework

**Describe the Issue**
We've started to rework the onboarding slides and held onboarding presentations in the new format. We want to finalize the slides for a more streamlined experience for oncoming teams.

**Additional Context**
Add any other context, attachments or screenshots

**Acceptance Criteria**
- New onboarding slide set created and stored in the shared team docs.

Start by reviewing the existing onboarding slides and the new-format onboarding presentations referenced in the issue. Confirm where the shared team docs are maintained, then create the streamlined onboarding slide set there; done means the new slide set is stored in the shared team docs.

Written by the indexing model from the issue text.