integrate request builder into HTTP client for googleapis support (#157)

error.go

@@ -0,0 +1,12 @@
+package http
+
+import "fmt"
+
+// Error is used when items in the error map do not implement the error interface and need to be wrapped.
+type Error struct {
+	err any
+}
+
+func (e *Error) Error() string {
+	return fmt.Sprintf("%+v", e.err)
+}