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.

install/plex-install.sh

@@ -14,7 +14,7 @@ network_check
 update_os
 
 msg_info "Setting Up Hardware Acceleration"
-$STD apt-get -y install {va-driver-all,ocl-icd-libopencl1,intel-opencl-icd,vainfo,intel-gpu-tools}
+$STD apt -y install va-driver-all ocl-icd-libopencl1 intel-opencl-icd vainfo intel-gpu-tools
 if [[ "$CTTYPE" == "0" ]]; then
   chgrp video /dev/dri
   chmod 755 /dev/dri
@@ -26,12 +26,18 @@ msg_ok "Set Up Hardware Acceleration"
 
 msg_info "Setting Up Plex Media Server Repository"
 curl -fsSL https://downloads.plex.tv/plex-keys/PlexSign.key | tee /usr/share/keyrings/PlexSign.asc >/dev/null
-echo "deb [signed-by=/usr/share/keyrings/PlexSign.asc] https://downloads.plex.tv/repo/deb/ public main" >/etc/apt/sources.list.d/plexmediaserver.list
+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 "Set Up Plex Media Server Repository"
 
 msg_info "Installing Plex Media Server"
-$STD apt-get update
-$STD apt-get -o Dpkg::Options::="--force-confold" install -y plexmediaserver
+$STD apt update
+$STD apt -y -o Dpkg::Options::="--force-confold" install plexmediaserver
 if [[ "$CTTYPE" == "0" ]]; then
   sed -i -e 's/^ssl-cert:x:104:plex$/render:x:104:root,plex/' -e 's/^render:x:108:root$/ssl-cert:x:108:plex/' /etc/group
 else
@@ -43,6 +49,7 @@ motd_ssh
 customize
 
 msg_info "Cleaning up"
-$STD apt-get -y autoremove
-$STD apt-get -y autoclean
+$STD apt -y autoremove
+$STD apt -y autoclean
+$STD apt -y clean
 msg_ok "Cleaned"