adding composer code

[admiralAwkbar]

This closes #1920

This will add the loop to run a composer install if the variable VALIDATE_PHP_PSALM is set to true and we find PHP code to validate.

This is now added to a new loop to help with additional linters that may need some additional work before a run

[admiralAwkbar]

Had to add some additional logic to look for composer.json file in the users repository. If the file is found, it will go to the location and run composer install
This should now make sure all libs and such are loaded for proper Psalm validation