feat(engine): 优化字幕引擎输出格式、准备合并两个字幕引擎

- 重构字幕引擎相关代码
- 准备合并两个字幕引擎

src/main/utils/Log.ts

@@ -0,0 +1,21 @@
+function getTimeString() {
+  const now = new Date()
+  const HH = String(now.getHours()).padStart(2, '0')
+  const MM = String(now.getMinutes()).padStart(2, '0')
+  const SS = String(now.getSeconds()).padStart(2, '0')
+  return `${HH}:${MM}:${SS}`
+}
+
+export class Log {
+  static info(...msg: any[]){
+    console.log(`[INFO ${getTimeString()}]`, ...msg)
+  }
+
+  static warn(...msg: any[]){
+    console.log(`[WARN ${getTimeString()}]`, ...msg)
+  }
+
+  static error(...msg: any[]){
+    console.log(`[ERROR ${getTimeString()}]`, ...msg)
+  }
+}