fix: harden shell scripts against injection and insecure permissions

Security fixes across multiple files:

- install.func: Quote command substitutions in mkdir/systemctl to prevent
  word splitting and globbing on GETTY_OVERRIDE path
- build.func: Escape sed special chars (& \) in current_os/hostname/ip
  before using them as sed replacement strings in update_motd_ip
- build.func: Escape regex metacharacters (. |) in $LANG before sed use
- build.func: Validate render_gid/video_gid as numeric before sed injection
- build.func: Use HTTPS for Alpine APK repositories instead of HTTP
- tools.func: Verify GPG dearmor output is non-empty (-s check)
- tools.func: Tighten GPU device permissions from 666 to 660 (owner+group)
- tools.func: Add chgrp render for /dev/kfd (AMD ROCm)
- shinobi-install.sh: chmod 777 -> 644 on version.json
- tasmoadmin-install.sh: chmod 777 -> 775 on tmp/data directories
- runtipi.sh: chmod 666 -> 660 on settings.json

install/shinobi-install.sh

@@ -35,7 +35,7 @@ cd Shinobi
 gitVersionNumber=$(git rev-parse HEAD)
 theDateRightNow=$(date)
 touch version.json
-chmod 777 version.json
+chmod 644 version.json
 echo '{"Product" : "'"Shinobi"'" , "Branch" : "'"master"'" , "Version" : "'"$gitVersionNumber"'" , "Date" : "'"$theDateRightNow"'" , "Repository" : "'"https://gitlab.com/Shinobi-Systems/Shinobi.git"'"}' >version.json
 msg_ok "Cloned Shinobi"
 

install/tasmoadmin-install.sh

@@ -23,7 +23,7 @@ fetch_and_deploy_gh_release "tasmoadmin" "TasmoAdmin/TasmoAdmin" "prebuild" "lat
 msg_info "Configuring TasmoAdmin"
 rm -rf /etc/php/8.4/apache2/conf.d/10-opcache.ini
 chown -R www-data:www-data /var/www/tasmoadmin
-chmod 777 /var/www/tasmoadmin/tmp /var/www/tasmoadmin/data
+chmod 775 /var/www/tasmoadmin/tmp /var/www/tasmoadmin/data
 cat <<EOF >/etc/apache2/sites-available/tasmoadmin.conf
 <VirtualHost *:9999>
 	ServerName tasmoadmin