feat: add http rate limiting

backend/providers/http/config.go

@@ -15,6 +15,7 @@ type Config struct {
 	BaseURI     *string
 	Tls         *Tls
 	Cors        *Cors
+	RateLimit   *RateLimit
 }
 
 type Tls struct {
@@ -27,6 +28,14 @@ type Cors struct {
 	Whitelist []Whitelist
 }
 
+type RateLimit struct {
+	Enabled       bool
+	Max           int
+	WindowSeconds int
+	Message       string
+	SkipPaths     []string
+}
+
 type Whitelist struct {
 	AllowOrigin      string
 	AllowHeaders     string