fix(goctl)/new parser (#3834)

Co-authored-by: keson <keson@kesondeMacBook-Pro.local>

tools/goctl/pkg/parser/api/parser/testdata/example.api

@@ -93,6 +93,12 @@ type (
 	NestDemoResp2 {
 *Nest `json:"nest"`
 	}
+	RootReq{
+
+	}
+	RootResp{
+
+	}
 )
 
 @server (
@@ -124,6 +130,23 @@ service example {
 	prefix:     /v1/v2
 	timeout:    100ms
 )
+service example {
+	@doc (
+		desc: "path demo"
+	)
+	@handler postPath
+	post /example/path (PostPathReq) returns (PostPathResp)
+
+	@handler root
+	post / (RootReq) returns (RootResp)
+}
+
+@server (
+	group:      path2
+	middleware: Path
+	prefix:     /v1/v3
+	timeout:    100ms
+)
 service example {
 	@doc (
 		desc: "path demo"