feat: Introduce settings package and refactor constants

- Added a new `setting` package to replace the `constant` package for configuration management, improving code organization and clarity.
- Moved various configuration variables such as `ServerAddress`, `PayAddress`, and `SensitiveWords` to the new `setting` package.
- Updated references throughout the codebase to use the new `setting` package, ensuring consistent access to configuration values.
- Introduced new files for managing chat settings and midjourney settings, enhancing modularity and maintainability of the code.

setting/sensitive.go

@@ -0,0 +1,43 @@
+package setting
+
+import "strings"
+
+var CheckSensitiveEnabled = true
+var CheckSensitiveOnPromptEnabled = true
+
+//var CheckSensitiveOnCompletionEnabled = true
+
+// StopOnSensitiveEnabled 如果检测到敏感词，是否立刻停止生成，否则替换敏感词
+var StopOnSensitiveEnabled = true
+
+// StreamCacheQueueLength 流模式缓存队列长度，0表示无缓存
+var StreamCacheQueueLength = 0
+
+// SensitiveWords 敏感词
+// var SensitiveWords []string
+var SensitiveWords = []string{
+	"test_sensitive",
+}
+
+func SensitiveWordsToString() string {
+	return strings.Join(SensitiveWords, "\n")
+}
+
+func SensitiveWordsFromString(s string) {
+	SensitiveWords = []string{}
+	sw := strings.Split(s, "\n")
+	for _, w := range sw {
+		w = strings.TrimSpace(w)
+		if w != "" {
+			SensitiveWords = append(SensitiveWords, w)
+		}
+	}
+}
+
+func ShouldCheckPromptSensitive() bool {
+	return CheckSensitiveEnabled && CheckSensitiveOnPromptEnabled
+}
+
+//func ShouldCheckCompletionSensitive() bool {
+//	return CheckSensitiveEnabled && CheckSensitiveOnCompletionEnabled
+//}