Remove dublicate csfixer and make rector usable

[dgvirtual]

I would like to see less failing tests on PRs... So I suggest fixing the code inspection side of the project. I am quite new at github actions so please take a careful look at this PR...

The changes included:

1. Since there are two cs-fixer files, remove the one that marks all PRs as invalid, make the system and github actions use the less-demanding cs-fixer.
2. Make the rector usable (comment out rules not found in the current version)
3. Fix composer command paths for code quality inspection and fixing

fix for #471

[lonnieezell]

I think this looks like the proper solution. Thanks for catching the missing rector classes. I wonder what they changed those too.. but that's a problem for another day. :)