Add the option '-a' to the 'check' command

[edsomjr]

This issue depends on the following issues:

• Add the opton '-s' to the 'check' command #27

Add the option -a to the check command

Description:

The cp-tools check -a command must validate all the solutions, tests, validators and checkers.
Currently, to validate each of these files, you need to run a specific command:

• -c / --checker for checkers
• -t / --tests for tests
• -v / --validator for validators
• -s / --solutions for solutions

It is desirable that the cp-tools check --all command validates all of these files at once.

Acceptance criteria:

• It must document the implemented parameters
• It must unit test this option