feat: mirror v-can guard chains

test/fixtures/basic/permissions/__can__.ts

@@ -4,7 +4,7 @@ const granted = new Set([
   'contract.create',
 ])
 
-export function __can__(path: string[]) {
-  const key = Array.isArray(path) ? path.join('.') : String(path)
+export function __can__(...path: string[]) {
+  const key = path.join('.')
   return granted.has(key)
 }