refactor: replace old bot code with Matrix infra configs and scripts

- Remove obsolete Python bot (Wordle, commands, callbacks, welcome)
- Add hookshot/ — all 11 webhook transformation functions + deploy.sh
- Add cinny/ — config.json and dev-update.sh (nightly dev branch build)
- Add landing/ — matrix.lotusguild.org landing page HTML
- Add systemd/ — livekit-server, draupnir, cinny cron unit files
- Add draupnir/ — production config (access token redacted)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

systemd/livekit-server.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=LiveKit SFU Server
+After=network.target
+
+[Service]
+Type=simple
+ExecStartPre=-/bin/bash -c 'pkill -x livekit-server; sleep 1'
+ExecStart=/usr/local/bin/livekit-server --config /etc/livekit/config.yaml
+Restart=on-failure
+RestartSec=5
+KillMode=control-group
+LimitNOFILE=65535
+
+[Install]
+WantedBy=multi-user.target