Refactor(constant): added rule string enums in configs as RuleConfig for better outside integrations (#2878)

rule/final.go

@@ -4,6 +4,9 @@ import (
 	C "github.com/Dreamacro/clash/constant"
 )
 
+// Implements C.Rule
+var _ C.Rule = (*Match)(nil)
+
 type Match struct {
 	adapter string
 }