GitLab Slack application - Update installation flow

Background

As part of the larger effort to Rebuild/refactor the Slack Application The installation flow will need to be updated.

Proposal

TBD by @lvanc

Todo

  1. Ensure that the latest Slack branding is used https://gitlab.com/gitlab-com/legal-and-compliance/-/issues/609
  2. Create first proposal
  3. Solicit feedback for other designer and engineers and Slack counterparts
  4. Iterate on designs based on feedback
  5. Involve Technical Writing
  6. Iterate on designs based on feedback from Technical Writing
  7. Define success metrics / tracking strategy
  8. Move to workflowplanning breakdown
Edited by Libor Vanc