feat: add translation API (#297)

* feat: add translation

* feat: resurface translation by Google Translation

* feat: renamed the service as `translate` to make more readable

* fix: renamed response and request name to match rpc name

* chore: delete useless blank line

* Update publicapi.json

* Update publicapi.json

* Update README.md

Co-authored-by: Asim Aslam <asim@aslam.me>

translate/proto/translate.pb.micro.go

@@ -0,0 +1,93 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: proto/translate.proto
+
+package translate
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
+
+import (
+	context "context"
+	api "github.com/micro/micro/v3/service/api"
+	client "github.com/micro/micro/v3/service/client"
+	server "github.com/micro/micro/v3/service/server"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ api.Endpoint
+var _ context.Context
+var _ client.Option
+var _ server.Option
+
+// Api Endpoints for Translate service
+
+func NewTranslateEndpoints() []*api.Endpoint {
+	return []*api.Endpoint{}
+}
+
+// Client API for Translate service
+
+type TranslateService interface {
+	Text(ctx context.Context, in *TextRequest, opts ...client.CallOption) (*TextResponse, error)
+}
+
+type translateService struct {
+	c    client.Client
+	name string
+}
+
+func NewTranslateService(name string, c client.Client) TranslateService {
+	return &translateService{
+		c:    c,
+		name: name,
+	}
+}
+
+func (c *translateService) Text(ctx context.Context, in *TextRequest, opts ...client.CallOption) (*TextResponse, error) {
+	req := c.c.NewRequest(c.name, "Translate.Text", in)
+	out := new(TextResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for Translate service
+
+type TranslateHandler interface {
+	Text(context.Context, *TextRequest, *TextResponse) error
+}
+
+func RegisterTranslateHandler(s server.Server, hdlr TranslateHandler, opts ...server.HandlerOption) error {
+	type translate interface {
+		Text(ctx context.Context, in *TextRequest, out *TextResponse) error
+	}
+	type Translate struct {
+		translate
+	}
+	h := &translateHandler{hdlr}
+	return s.Handle(s.NewHandler(&Translate{h}, opts...))
+}
+
+type translateHandler struct {
+	TranslateHandler
+}
+
+func (h *translateHandler) Text(ctx context.Context, in *TextRequest, out *TextResponse) error {
+	return h.TranslateHandler.Text(ctx, in, out)
+}