refactor: 脚本及配置文件命名统一用 _ 分隔

将 .sh/.bat 脚本与 .js/.plist/.Dockerfile 等文件中以 - 分隔的文件名
改为 _ 分隔，dcloud-renew 目录改为 dcloud、script_nuance 目录改为
nuance，并同步更新脚本内部引用与 README 路径。

Co-Authored-By: AtomCode (deepseek-v4-flash) <noreply@atomgit.com>

nuance/tools/split_utd_by_500.pl

@@ -0,0 +1,25 @@
+open UTD, "$ARGV[0]" or die;
+
+$nr_utt = 0;
+
+$nr_block = 0;
+
+$head = "";
+
+while (<UTD>)
+{
+    if (not m|/datadigest/|)
+    {
+	$head = $head."$_";
+    }else
+    {
+	if ($nr_utt % 500 == 0)
+	{
+	    $nr_block ++;
+	    open FH, ">$ARGV[0].$nr_block" or die;
+	    print FH $head;
+	}
+	print FH;
+	$nr_utt ++;
+    }
+}