Move prototype 69-dagger-archon to top-level

Signed-off-by: Solomon Hykes <sh.github.6811@hykes.org>

cmd/dagger-frontend/main.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"dagger.cloud/go/dagger"
+	"github.com/moby/buildkit/frontend/gateway/grpcclient"
+	"github.com/moby/buildkit/util/appcontext"
+)
+
+func main() {
+	r := &dagger.Runtime{}
+	if err := grpcclient.RunFromEnvironment(appcontext.Context(), r.BKFrontend); err != nil {
+		panic(err)
+	}
+}