rules: remove the requirement of "path must start with /"

internal/route/rules/on.go

@@ -145,7 +145,7 @@ var checkers = map[string]struct {
 				/path/to
 				/path/to/*`,
 			args: map[string]string{
-				"path": "the request path, must start with /",
+				"path": "the request path",
 			},
 		},
 		validate: validateURLPath,

internal/route/rules/validate.go

@@ -96,9 +96,6 @@ func validateURLPath(args []string) (any, E.Error) {
 	if trailingSlash {
 		p += "/"
 	}
-	if p[0] != '/' {
-		return nil, ErrInvalidArguments.Withf("must start with /")
-	}
 	return p, nil
 }