feat(build): add prestashop/php-dev-tools support

[jokesterfr]

Questions	Answers
Description?	PrestaShop php-dev-tools are handy to validate any modules. Shipping them in flashlight will fasten their use across multiple PrestaShop versions in the CI of your module project. See: https://github.com/PrestaShop/php-dev-tools/tree/master. Add openssh-client support.
Type?	new feature
BC breaks?	no
Deprecations?	no
Fixed ticket?	N/A
Sponsor company	PrestaShop SA
How to test?	setup your neon file to include this /var/opt/prestashop/php-dev-tools/phpstan/ps-module-extension.neon

[jokesterfr]

TODO:

• [x] Missing usage example for phpstan & php cs fixer coding standard
• [x] Paths should be fixed in spec files