refactor docs

[synfinatic]

• Move commands to their own file
• Highlight the features of aws-sso near the top

[codecov]

Codecov Report

Merging #352 (d181efe) into main (a94eddb) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #352   +/-   ##
=======================================
  Coverage   75.89%   75.89%           
=======================================
  Files          15       15           
  Lines        2107     2107           
=======================================
  Hits         1599     1599           
  Misses        449      449           
  Partials       59       59           

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