Migrate to FastCGI

Migrate to FastCGI

Credits

Work is started within https://gitlab.com/pheix-pool/core-perl6/-/tree/fastcgi;

Workaround & questions

1. How captcha is worked under FastCGI::NativeCall;
2. How POST requests are worked under FastCGI::NativeCall;
3. How to reset FastCGI connection (now we need to restart Apache server);
4. What's Pheix modules are depended on CGI/Fast CGI (we need to create the list);
5. Do we need November CGI library for FastCGI;

Goal

1. Introduce REST API;
2. Rewrite code base;
3. Rewrite test bundle;