Migrate Plex repo to Deb822 and update install scripts

Updated plex-install.sh and plex.sh to use the Deb822 repository format for Plex Media Server, replacing the old sources.list method. Also switched apt-get commands to apt for consistency and improved update/cleanup steps.

ct/plex.sh

@@ -23,26 +23,31 @@ function update_script() {
   header_info
   check_container_storage
   check_container_resources
-  if [[ ! -f /etc/apt/sources.list.d/plexmediaserver.list ]]; then
-    msg_error "No ${APP} Installation Found!"
-    exit
+
+    if [[ -f /etc/apt/sources.list.d/plexmediaserver.list ]]; then
+    msg_info "Migrating Plex repository to Deb822 format"
+    rm -f /etc/apt/sources.list.d/plexmediaserver.list
+    curl -fsSL https://downloads.plex.tv/plex-keys/PlexSign.key | tee /usr/share/keyrings/PlexSign.asc >/dev/null
+    cat <<EOF >/etc/apt/sources.list.d/plexmediaserver.sources
+Types: deb
+URIs: https://downloads.plex.tv/repo/deb/
+Suites: public
+Components: main
+Signed-By: /usr/share/keyrings/PlexSign.asc
+EOF
+    msg_ok "Migrated Plex repository to Deb822"
   fi
-  UPD=$(whiptail --backtitle "Proxmox VE Helper Scripts" --title "SUPPORT" --radiolist --cancel-button Exit-Script "Spacebar = Select \nplexupdate info >> https://github.com/mrworf/plexupdate" 10 59 2 \
-    "1" "Update LXC" ON \
-    "2" "Install plexupdate" OFF \
-    3>&1 1>&2 2>&3)
-  if [ "$UPD" == "1" ]; then
-    msg_info "Updating ${APP} LXC"
-    $STD apt-get update
-    $STD apt-get -y upgrade
-    msg_ok "Updated ${APP} LXC"
-    exit
-  fi
-  if [ "$UPD" == "2" ]; then
-    set +e
-    bash -c "$(curl -fsSL https://raw.githubusercontent.com/mrworf/plexupdate/master/extras/installer.sh)"
-    exit
+
+  if [[ ! -f /etc/apt/sources.list.d/plexmediaserver.sources ]]; then
+    msg_error "No ${APP} repository found!"
+    exit 1
   fi
+
+  msg_info "Updating ${APP}"
+  $STD apt update
+  $STD apt -y -o Dpkg::Options::="--force-confold" upgrade plexmediaserver
+  msg_ok "Updated ${APP}"
+  exit
 }
 
 start