Linting the PHP Code Base

[ConradSollitt]

Currently the PHP Code base is well tested but not fully linted. Minor updates are being made for validation with limiting tools. Almost all updates are related to PHPDoc Comments or false positive issues that need to be ignored.

This will be an on-going update over the next few weeks. Any help would be greatly appreciated. PHP experience is not needed since it's mostly code comments and validation. If you know JavaScript or another language that should be enough and this could be a good way for someone to become more familiar with PHP.

See notes near the top to-do-list file:
https://github.com/fastsitephp/fastsitephp/blob/master/docs/to-do-list.txt

PHP Linters (Static Analysis Tools) being tested
https://github.com/phpstan/phpstan
https://github.com/vimeo/psalm
https://github.com/phan/phan

[ConradSollitt]

All Framework code is now linted so this issue will be closed out.

phpstan was chosen. For info on how to run see comments in:
https://github.com/fastsitephp/fastsitephp/blob/master/phpstan.neon

A previous config file for psalm is shown here however psalm will not be used so the file is being deleted from the master branch.
https://github.com/fastsitephp/fastsitephp/blob/ed87047e8b6199d0f8baf69362845674a0a28556/psalm.xml