chore(bots): re-structure grpc folder.

Signed-off-by: Bo-Yi.Wu <appleboy.tw@gmail.com>

routers/api/bots/ping/ping.go

@@ -0,0 +1,31 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package ping
+
+import (
+	"context"
+	"fmt"
+
+	"code.gitea.io/gitea/modules/log"
+	pingv1 "gitea.com/gitea/proto-go/ping/v1"
+
+	"github.com/bufbuild/connect-go"
+)
+
+type Service struct{}
+
+func (s *Service) Ping(
+	ctx context.Context,
+	req *connect.Request[pingv1.PingRequest],
+) (*connect.Response[pingv1.PingResponse], error) {
+	log.Info("Content-Type: %s", req.Header().Get("Content-Type"))
+	log.Info("User-Agent: %s", req.Header().Get("User-Agent"))
+	log.Info("X-Gitea-Token: %s", req.Header().Get("X-Gitea-Token"))
+	res := connect.NewResponse(&pingv1.PingResponse{
+		Data: fmt.Sprintf("Hello, %s!", req.Msg.Data),
+	})
+	res.Header().Set("Gitea-Version", "v1")
+	return res, nil
+}