i18n: migrate all German text to English

Enforce the repo convention that committed text is English.
Translates ABOUTME headers, code comments, log/error messages,
shell prompts, and documentation across all files.
CLAUDE.md files remain in German per policy.

packages/aur.txt

@@ -1,7 +1,7 @@
-# ABOUTME: Liste der AUR-Pakete, die nach der Basisinstallation via paru installiert werden.
-# ABOUTME: Wird von post-install.sh verwendet.
+# ABOUTME: List of AUR packages installed via paru after the base installation.
+# ABOUTME: Used by post-install.sh.
 
-# AUR Helper (wird zuerst manuell gebaut)
+# AUR Helper (built manually first)
 # paru
 
 # Theming
@@ -18,7 +18,7 @@ wl-color-picker
 wlogout
 gtklock-dpms-module
 
-# Anwendungen
+# Applications
 blueberry
 waterfox-bin
 

packages/official.txt

@@ -1,5 +1,5 @@
-# ABOUTME: Liste der offiziell installierten Pakete aus den Arch-Repos.
-# ABOUTME: Wird von archinstall und post-install.sh verwendet.
+# ABOUTME: List of official packages from Arch repos.
+# ABOUTME: Used by archinstall and post-install.sh.
 
 # Base
 base
@@ -26,7 +26,7 @@ jq
 ripgrep
 lazygit
 
-# Netzwerk
+# Network
 networkmanager
 network-manager-applet
 networkmanager-openvpn
@@ -51,7 +51,7 @@ pavucontrol
 niri
 xwayland-satellite
 
-# Desktop-Utilities
+# Desktop Utilities
 waybar
 dunst
 cliphist
@@ -65,7 +65,7 @@ nwg-look
 greetd
 polkit-gnome
 
-# Dateimanager / XDG
+# File Manager / XDG
 gvfs
 gvfs-dnssd
 gvfs-mtp
@@ -79,10 +79,10 @@ qt6-5compat
 # Themes & Fonts
 ttf-ubuntusans-nerd
 
-# Anwendungen
+# Applications
 viewnior
 
-# Entwicklung
+# Development
 git
 glab
 go