feat: 算力引擎 Go 后端核心（new-api）

- 统一 OpenAI 兼容 /v1 中继 + 渠道/额度/令牌/流水
- 各领域包：relay 模型网关、model 数据层、controller 管理 API

setting/operation_setting/payment_setting_old.go

@@ -0,0 +1,59 @@
+/**
+此文件为旧版支付设置文件，如需增加新的参数、变量等，请在 payment_setting.go 中添加
+This file is the old version of the payment settings file. If you need to add new parameters, variables, etc., please add them in payment_setting.go
+*/
+
+package operation_setting
+
+import (
+	"github.com/QuantumNous/new-api/common"
+)
+
+var PayAddress = ""
+var CustomCallbackAddress = ""
+var EpayId = ""
+var EpayKey = ""
+var Price = 7.3
+var MinTopUp = 1
+var USDExchangeRate = 7.3
+
+var PayMethods = []map[string]string{
+	{
+		"name": "支付宝",
+		"icon": "SiAlipay",
+		"type": "alipay",
+	},
+	{
+		"name": "微信",
+		"icon": "SiWechat",
+		"type": "wxpay",
+	},
+	{
+		"name":      "自定义1",
+		"icon":      "LuCreditCard",
+		"type":      "custom1",
+		"min_topup": "50",
+	},
+}
+
+func UpdatePayMethodsByJsonString(jsonString string) error {
+	PayMethods = make([]map[string]string, 0)
+	return common.Unmarshal([]byte(jsonString), &PayMethods)
+}
+
+func PayMethods2JsonString() string {
+	jsonBytes, err := common.Marshal(PayMethods)
+	if err != nil {
+		return "[]"
+	}
+	return string(jsonBytes)
+}
+
+func ContainsPayMethod(method string) bool {
+	for _, payMethod := range PayMethods {
+		if payMethod["type"] == method {
+			return true
+		}
+	}
+	return false
+}