feat(cli): add command to verify an agent configuration file

[mirceanis]

Run veramo config check in a terminal to check that the agent.yml syntax is correct and that an agent can be created from it.
In case of YML errors, the problematic line is indicated.

You can check for a different file using the -f option and also verify that a particular method can be called on the created agent using the -m option.

I also added some aliases and a more descriptive output to the veramo config create-secret-key command.

[codecov]

Codecov Report

Merging #729 (85d3208) into next (88264db) will increase coverage by 11.45%.
The diff coverage is 76.01%.

@@             Coverage Diff             @@
##             next     #729       +/-   ##
===========================================
+ Coverage   67.58%   79.03%   +11.45%     
===========================================
  Files          62       85       +23     
  Lines        1530     2609     +1079     
  Branches      247      447      +200     
===========================================
+ Hits         1034     2062     +1028     
- Misses        400      545      +145     
+ Partials       96        2       -94