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>

rename_host.sh

@@ -0,0 +1,16 @@
+if [ $1 ]
+then
+  NewHostname=$1
+else
+  echo "::*** Set [new hostname] or [leave blank] for no change"
+  read -p "***:: " NewHostname
+fi
+
+if [ $NewHostname ]
+then
+  hostnamectl set-hostname $NewHostname
+  sed -i "s|\b$`hostname`\b|$NewHostname|g" /etc/hosts # echo "127.0.0.1 $NewHostname" >> /etc/hosts
+else
+  echo 'Nothing changed'
+fi
+echo