Improve error message with YAML parsing #51
Description
Trying to add a module I get this:
vagrant@zimagi:~$ zimagi module add https://github.com/zimagi/module-model-manager.git
** while parsing a block mapping
This is not wrong. Using a Python shell manually, I see that indeed I made an error in my YAML:
ParserError: while parsing a block mapping
in "spec/data/training-event.yml", line 102, column 9
expected <block end>, but found '<scalar>'
However, presenting the full message, or at least more of it would allow developers to see within Zimagi itself something meaningful about what went wrong.