Improving onboarding

[Dehelssey]

Context

We've worked on an onboarding back then, and went for 4 steps. Then, soapbox added its own onboarding and we merged the two of them. So now we have NINE steps of onboarding, and think we don't need all of them.

After that, people are directed to their (empty) home feed.

Proposed solution

Remove steps 2 to 5 (related to profile customization) Add a secondary button on last step to give the user the choice to dive in the conversation OR customize their profile first.

If people click the "let's go" button they're redirected to the local feed instead of the empty home one. Also, an empty feed should at least display a message on how to populate it (ie with a link to the Profiles Directory)