Add hourly news briefing system with continuous marquee scroll

- Fetches 12 articles hourly from FreshRSS
- Generates 4-6 sentence summaries using Ollama
- Creates sequential sethpc.xyz short links (pi0, pi1, etc.) via yourls
- Continuous vertical marquee scrolling at reading speed
- No wait between rescrolls - immediately loops to next pass
- New briefing generated every hour at :00
- Systemd service and timer for auto-start and hourly scheduling

piNail2/pinail-briefing.service

@@ -0,0 +1,19 @@
+[Unit]
+Description=piNail Hourly News Briefing Display
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/home/pi/piNail2
+ExecStart=/usr/bin/python3 /home/pi/piNail2/tty_briefing.py
+Restart=always
+RestartSec=10
+StandardOutput=tty
+StandardError=file:/tmp/briefing.log
+TTYPath=/dev/tty1
+SyslogIdentifier=pinail-briefing
+
+[Install]
+WantedBy=multi-user.target