docs: dydx v5 and v6 quickstart docs

[technicallyty]

• adds different sections for the v5 and v6 dydx nodes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.59%. Comparing base (4ab8c8b) to head (36acb1d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #645      +/-   ##
==========================================
- Coverage   56.60%   56.59%   -0.02%     
==========================================
  Files         254      254              
  Lines       13396    13396              
==========================================
- Hits         7583     7581       -2     
- Misses       5084     5086       +2     
  Partials      729      729              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.