Walkthrough (onboarding checklist) revamp

[d13]

Overview

This succeeds the home onboarding checklist in favor of updating our Walkthrough. We may still provide an progress indicator of the checked steps on the home view.

References

GitLens Onboarding Figma

Walkthrough Steps with Completion Triggers

Walkthrough Contributions Guide

High-level TODOs

• 1st priority changes
  • [x] In the package.json, under contributes > walkthroughs > welcome, setup new walkthrough steps with actions and states
  • [x] Implement completionEvents based on spreadsheet's triggers + account state (this will probably be the most work)
• 2nd priority changes
  • [ ] Review step verbiage with product
  • [ ] Add media for each step