[docs] Add cryptography examples

[hhunter-ms]

Add encrypt and decrypt examples to the go client doc Remove empty headers that still need examples someday :)

[codecov[bot]]

Codecov Report

Merging #396 (d4132a3) into main (d485c17) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #396   +/-   ##
=======================================
  Coverage   68.93%   68.93%           
=======================================
  Files          31       31           
  Lines        2479     2479           
=======================================
  Hits         1709     1709           
  Misses        676      676           
  Partials       94       94           

[daixiang0]

@hhunter-ms please make CI happy then we can make it land.