feat: add wrapper for WFHasPrivilege in c++ header

wfassoc-cdylib/cbinding/wfassoc++.h

@@ -79,6 +79,18 @@ inline void _Check(wfassoc::WFError result) {
     }
 }
 
+/**
+ * @brief Check if the current process has administrative privileges
+ *
+ * @return true if the current process has administrative privileges, false otherwise
+ * @throws std::runtime_error if the operation fails
+ */
+inline bool HasPrivilege() {
+    bool result = false;
+    _Check(wfassoc::WFHasPrivilege(&result));
+    return result;
+}
+
 /**
  * @brief Schema object for defining a program's file association configuration
  *