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>

caddy_install.sh

@@ -0,0 +1,16 @@
+echo Installing this package automatically starts and runs Caddy as a systemd service named caddy. It also comes with an optional caddy-api service which is not enabled by default, but should be used if you primarily configure Caddy via its API instead of config files.
+
+sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https
+curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | sudo gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
+curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | sudo tee /etc/apt/sources.list.d/caddy-stable.list
+sudo apt update
+sudo apt install caddy
+
+echo 
+echo Certificates will be saved automatically in ~/.local/share/caddy/certificates/acme-v02.api.letsencrypt.org-directory/
+echo Config file of caddy started by systemctl : /etc/caddy/Caddyfile
+
+# 202601 注意到 caddy 的 gpg.key 过时了，导致 apt update 报错。更新：
+# https://github.com/caddyserver/caddy/issues/7411
+# [Solved] Caddy's APT repo (ubuntu/debian) GPG key has expired · Issue #7411 · caddyserver/caddy
+# curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | sudo gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg