Initial commit: potluck signup app

Go + chi + SQLite + HTMX with SSE live updates.
Soft Brutalism design, emoji picker, Docker deploy.

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

sqlc.yaml

@@ -0,0 +1,9 @@
+version: "2"
+sql:
+  - engine: "sqlite"
+    queries: "db/queries.sql"
+    schema: "schema.sql"
+    gen:
+      go:
+        package: "db"
+        out: "db"