Add ansible Galaxy remote type

- add ansible package type proxying the Galaxy v3 API
- rewrite href/links/download_url back to the remote so tarballs flow through it
- forward the query string for providers that opt in, keeping Galaxy pagination working
- add a UI usage snippet and an ansible e2e caching case

internal/api/v1/proxy.go

@@ -92,6 +92,10 @@ func (h *ProxyHandler) handleProxy(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	if _, ok := prov.(provider.QueryForwarder); ok && r.URL.RawQuery != "" {
+		path += "?" + r.URL.RawQuery
+	}
+
 	result, err := h.engine.Fetch(r.Context(), *remote, path, prov, r.Header)
 	if err != nil {
 		var proxyErr *proxy.ProxyError