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/reasoning/suffix.go

@@ -0,0 +1,19 @@
+// Package reasoning re-exports the pure model-name effort-suffix helpers,
+// which moved to the conversion kit (service/relayconvert/reasoning) as part
+// of the relaykit extraction. Host code keeps importing this path unchanged.
+package reasoning
+
+import kitreasoning "github.com/QuantumNous/new-api/relaykit/relayconvert/reasoning"
+
+var (
+	EffortSuffixes           = kitreasoning.EffortSuffixes
+	OpenAIEffortSuffixes     = kitreasoning.OpenAIEffortSuffixes
+	DeepSeekV4EffortSuffixes = kitreasoning.DeepSeekV4EffortSuffixes
+)
+
+var (
+	TrimEffortSuffix                          = kitreasoning.TrimEffortSuffix
+	TrimEffortSuffixWithSuffixes              = kitreasoning.TrimEffortSuffixWithSuffixes
+	ParseOpenAIReasoningEffortFromModelSuffix = kitreasoning.ParseOpenAIReasoningEffortFromModelSuffix
+	ParseDeepSeekV4ThinkingSuffix             = kitreasoning.ParseDeepSeekV4ThinkingSuffix
+)