Add underlying-proxy, smart policy group support for surge and renaming surge wireguard section (#747)

* Use short hash of wireguard name for surge section name
Add underlying-proxy support for clash parser and surge exporter

* Add surge smart group support

* Allow clash to fallback to url-test in smart proxygroup

* Fix duplicate break statement in binding.h

.gitignore

@@ -3,3 +3,4 @@ subconverter.exe
 cmake-build-debug
 .idea
 base/cache
+build