feat: direct call download api by cgo

pkg/api/model/extension.go

@@ -0,0 +1,18 @@
+package model
+
+type InstallExtension struct {
+	DevMode bool   `json:"devMode"`
+	URL     string `json:"url"`
+}
+
+type UpdateExtensionSettings struct {
+	Settings map[string]any `json:"settings"`
+}
+
+type SwitchExtension struct {
+	Status bool `json:"status"`
+}
+
+type UpgradeCheckExtensionResp struct {
+	NewVersion string `json:"newVersion"`
+}