INCY subscription endpoint OK

Main:
  /sub/test
  /sub/test/plain
  /sub/test/base64
  /sub/test/json
  /sub/test/happ
  /sub/test/hiddify

Protocols:
  /sub/test/reality
  /sub/test/xhttp
  /sub/test/hysteria2
  /sub/test/vless

Nodes:
  /sub/test/paris
  /sub/test/usa

Legacy:
  /incy-test.txt
  /incy-test-base64.txt