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

common/utils.go

@@ -0,0 +1,14 @@
+package common
+
+import (
+	"fmt"
+	"github.com/songquanpeng/one-api/common/config"
+)
+
+func LogQuota(quota int64) string {
+	if config.DisplayInCurrencyEnabled {
+		return fmt.Sprintf("＄%.6f 额度", float64(quota)/config.QuotaPerUnit)
+	} else {
+		return fmt.Sprintf("%d 点额度", quota)
+	}
+}