fix: Warnings from stream_select muted

chore: Cleanup

fix: Refactored Stream polling implementation significantly to fix su…

…btle bugs and potential memory leak.

fix: Improved debug output
fix: FastCGI Record parser/builder added FCGI_UNKNOWN_TYPE record.

fix: Issue with make lint when multiple directories passed from comma…

…nd to php-cs-fixer

fix: Un-deprecated the HttpClient and made sure it works outside of p…

…hasync coroutines as well as inside with asynchronous requests anywhere.

fix: Removed troublesome and unimportant test. The test failed on ext…

…remely slow github CI servers because of the extreme slowness.

fix: phasync\Util\FastCGI\Record referred to older class names for Ob…

…jectPoolInterface/ObjectPoolTrait

fix: Fixed a bug in the ExecutionOrderTest in which for very slow mac…

…hines the phasync::go() call would preempt and this caused the test to fail.

docs: Added a lot of documentation for functionality.

chore: Wrote a large number of new tests.
fix: io::fputcsv() did not work as expected thanks to incorrect return value type declaration.
refactor: refactored the CurlMulti class to be more readable.

chore: Cleaned up some source code. This code was not part of the tes…

…ting framework and not part of the core application and was not working, so it is not considered part of the released version nor as a breaking change.