init: initial commit

- ticker / QR ad overlay / break slide graphics (1920×1080) with all
  geometry derived from one shared module (src/shared/obs-geometry.mjs)
- OBS scene-collection generator (scripts/generate-obs-scenes.mjs) and a
  read-only in-dashboard setup verifier, both driven by the same module
- en/sr dashboard i18n selected via bundle config; configschema.json with
  neutral first-run defaults seeded from optional branding config
- install.sh / systemd user service / update.sh for venue deployment
- reference OBS scene collection + profile from a real venue as fixtures

.gitignore

@@ -0,0 +1,13 @@
+# dependencies
+node_modules/
+
+# Parcel build outputs (rebuilt from src/) — anchored so src/dashboard etc. stay tracked
+/dashboard/
+/graphics/
+/extension/
+.parcel-cache/
+
+# generated OBS scene collections (re-run npm run obs:scenes)
+/obs/generated/
+
+*.log