feat: support ollama (close #112)

relay/channel/ollama/dto.go

@@ -0,0 +1,18 @@
+package ollama
+
+import "one-api/dto"
+
+type OllamaRequest struct {
+	Model    string         `json:"model,omitempty"`
+	Messages []dto.Message  `json:"messages,omitempty"`
+	Stream   bool           `json:"stream,omitempty"`
+	Options  *OllamaOptions `json:"options,omitempty"`
+}
+
+type OllamaOptions struct {
+	Temperature float64 `json:"temperature,omitempty"`
+	Seed        float64 `json:"seed,omitempty"`
+	Topp        float64 `json:"top_p,omitempty"`
+	TopK        int     `json:"top_k,omitempty"`
+	Stop        any     `json:"stop,omitempty"`
+}