VoxIP Kiosk OS 1.0.0: Raspberry Pi kiosk with web management

Chromium kiosk without a desktop for the Raspberry Pi 3, a Flask web
interface on port 8080 (kiosk, system and network management), a
restricted root helper, network changes with automatic rollback, a
healthcheck timer, install/update/uninstall scripts and a pi-gen image
build.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

config/journald.conf

@@ -0,0 +1,11 @@
+# VoxIP Kiosk OS: bounded journal, few SD-card writes.
+[Journal]
+Storage=persistent
+SystemMaxUse=32M
+SystemMaxFileSize=8M
+RuntimeMaxUse=24M
+MaxRetentionSec=1month
+# Errors (crit and worse) are always written immediately.
+SyncIntervalSec=15m
+RateLimitIntervalSec=30s
+RateLimitBurst=2000