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>

cinny/config.json

@@ -0,0 +1,17 @@
+{
+  "defaultHomeserver": 0,
+  "homeserverList": [
+    "matrix.lotusguild.org"
+  ],
+  "allowCustomHomeservers": false,
+  "featuredCommunities": {
+    "openAsDefault": false,
+    "spaces": [],
+    "rooms": [],
+    "servers": []
+  },
+  "hashRouter": {
+    "enabled": false,
+    "basename": "/"
+  }
+}