first commit: one-api base code + SAAS plan document

controller/group.go

@@ -0,0 +1,19 @@
+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+	billingratio "github.com/songquanpeng/one-api/relay/billing/ratio"
+	"net/http"
+)
+
+func GetGroups(c *gin.Context) {
+	groupNames := make([]string, 0)
+	for groupName := range billingratio.GroupRatio {
+		groupNames = append(groupNames, groupName)
+	}
+	c.JSON(http.StatusOK, gin.H{
+		"success": true,
+		"message": "",
+		"data":    groupNames,
+	})
+}