feat: support xinference rerank to jina format

relay/channel/xinference/dto.go

@@ -0,0 +1,11 @@
+package xinference
+
+type XinRerankResponseDocument struct {
+	Document       string  `json:"document,omitempty"`
+	Index          int     `json:"index"`
+	RelevanceScore float64 `json:"relevance_score"`
+}
+
+type XinRerankResponse struct {
+	Results []XinRerankResponseDocument `json:"results"`
+}