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/config.default.json

@@ -0,0 +1,15 @@
+{
+  "device_name": "VoxIP Kiosk",
+  "url": "https://schermen-ijsselflat.voxip.nl",
+  "refresh_interval": 0,
+  "screen_always_on": true,
+  "screen_off_minutes": 10,
+  "rotation": 0,
+  "resolution": "auto",
+  "zoom": 1.0,
+  "browser_restart": true,
+  "browser_profile": "persistent",
+  "admin_port": 8080,
+  "admin_https": false,
+  "admin_allow_public": false
+}