Add data directly without checking paths

[engahmeds3ed]

Sometimes we need to use our own checks if path is found or not so we don't need to run the following code over it

https://github.com/engahmeds3ed/minify/blob/4eeda08af72a1012202e0dc7d99436f06714b086/src/Minify.php#L471

for example we have our own filesystem the is being replaced while running tests to use virtual filesystem so on this case is_file and is_readable won't work properly.

also another example, if I have file path and I need to do some changes on the content itself then send it to be minified ( assume also this file has some imports that need to be replaced ) so I need to pass the path along with the modified contents.

I hope u can do code review and validate quickly, thanks in advance.