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/sudoers

@@ -0,0 +1,4 @@
+# VoxIP Kiosk OS: the web interface (user voxip) may run exactly one program
+# as root: the restricted helper, which validates all of its input itself.
+Defaults:voxip !requiretty
+voxip ALL=(root) NOPASSWD: /usr/lib/voxip-kiosk/voxip-kiosk-helper