cmd/osbuild-worker-executor: import verbatim from mvo5/oaas

This commit imports the repository https://github.com/mvo5/oaas
without keeping the history. The history is largely unimportant
and can be looked up in https://github.com/mvo5/oaas/commits/main
if needed.

cmd/osbuild-worker-executor/routes.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/sirupsen/logrus"
+)
+
+func addRoutes(mux *http.ServeMux, logger *logrus.Logger, config *Config) {
+	mux.Handle("/api/v1/build", handleBuild(logger, config))
+	mux.Handle("/api/v1/result/", http.StripPrefix("/api/v1/result/", handleResult(logger, config)))
+	mux.Handle("/", handleRoot(logger, config))
+}