Rename every remaining voxip name to daynivo, with a one-time migration

Services (daynivo-kiosk-*, daynivo-network-guard, daynivo-boot-import),
programs in /usr/lib/daynivo-kiosk, folders /etc, /var/lib, /var/log and
/var/cache daynivo-kiosk*, the system user daynivo, DAYNIVO_* settings,
the plymouth theme, network profiles daynivo-eth0/wlan0, the image stage
and its first user daynivoadmin.

install.sh moves a kiosk installed up to 1.2.x over once: old services
stopped and removed, folders moved (configuration, password, browser
profile, logs) with symlinks under the old names, the voxip user renamed
with the same uid, network profiles renamed unless a change awaits
confirmation, and old leftovers removed. Tested by upgrading a configured
1.2.0 installation in a container, and running the install a second time.

Old names keep working where people type or place them: voxip-config.json,
voxip-authorized_keys, voxip-network-reset, voxip-kiosk-ctl, and
VOXIP_DEFAULT_URL / VOXIP_DEVICE_NAME for image builds.

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

tests/test_netconfig.py

@@ -27,7 +27,7 @@ def test_keyfile_static_ethernet():
     req = n.validate_request({"interface": "eth0", "method": "static", "address": "10.1.2.3/16", "gateway": "10.1.0.1", "dns": ["10.1.0.1"]})
     text = n.build_keyfile(req, uuid="11111111-2222-3333-4444-555555555555")
     kf = n.read_keyfile(text)
-    assert kf.get("connection", "id") == "voxip-eth0"
+    assert kf.get("connection", "id") == "daynivo-eth0"
     assert kf.get("connection", "type") == "ethernet"
     assert kf.get("connection", "autoconnect-priority") == "100"
     assert kf.get("ipv4", "method") == "manual"