chore: prepare for srt support + force sync lrc timestamp if timeline length mismatch

convert.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func lrcToTxt(sourceFile, targetFile string) {
+	sourceLyrics, err := parseLyrics(sourceFile)
+	if err != nil {
+		fmt.Println("Error parsing source lyrics file:", err)
+		return
+	}
+
+	file, err := os.Create(targetFile)
+	if err != nil {
+		fmt.Println("Error creating target file:", err)
+		return
+	}
+	defer file.Close()
+
+	for _, content := range sourceLyrics.Content {
+		fmt.Fprintln(file, content)
+	}
+}