Tastatur-Fix, Zsh-Tooling, cloud-init, Autoinstall-Fix

setup-base.sh:
- Tastatur: mac_nodeadkeys + iso_layout=0 (fixt ^/< Swap, @ auf Alt+L)
- Neue Pakete: libheif-examples, imagemagick, pipx, zoxide, micro
- cloud-init deaktivieren (blockiert Boot ohne Cloud-Provider)
- dpkg-reconfigure nach Keyboard-Änderung

setup-desktop.sh:
- Powerlevel10k + zsh-syntax-highlighting von GitHub klonen
- MesloLGS NF Fonts installieren
- PlatformIO via pipx
- .zshrc deployen (Linux-Version mit allen Aliases)
- .p10k.zsh aus dotfiles-rene deployen
- git-check-all.sh + git-update-all.sh verlinken
- XFCE Keyboard-Override deaktivieren (XkbDisable)
- XFCE Terminal auf MesloLGS NF setzen
- DPMS-Werte gestaffelt (5/6/7 Min statt alle 10)

build-iso.sh:
- cloud-config-url=/dev/null (Fix für Ubuntu 24.04 Autoinstall)

user-data:
- Keyboard-Variante mac_nodeadkeys

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

build-iso.sh

@@ -100,7 +100,7 @@ set timeout=10
 
 menuentry "Ubuntu MacBook AutoInstall" {
     set gfxpayload=keep
-    linux /casper/vmlinuz quiet autoinstall ds=nocloud\;s=/cdrom/autoinstall/ ---
+    linux /casper/vmlinuz quiet autoinstall cloud-config-url=/dev/null ds=nocloud\;s=/cdrom/autoinstall/ ---
     initrd /casper/initrd
 }