feat: localchat, a Go + Templ + HTMX chat app for local Gemma models

Streams replies over SSE from any OpenAI-compatible server (oMLX,
llama.cpp, Ollama, ...). Single binary that can install itself as an
OS service; docker compose bundles llama.cpp + Gemma 4 E2B.

.gitignore

@@ -0,0 +1,6 @@
+bin/
+.env
+*.local
+dist/
+dev/
+.DS_Store