rpc service generation (#26)

* add execute files

* add protoc-osx

* add rpc generation

* add rpc generation

* add: rpc template generation

* update usage

* fixed env prepare for project in go path

* optimize gomod cache

* add README.md

* format error

* reactor templatex.go

* remove waste code

tools/goctl/rpc/command/command.go

@@ -0,0 +1,23 @@
+package command
+
+import (
+	"github.com/urfave/cli"
+
+	"github.com/tal-tech/go-zero/tools/goctl/rpc/ctx"
+	"github.com/tal-tech/go-zero/tools/goctl/rpc/goen"
+)
+
+func Rpc(c *cli.Context) error {
+	rpcCtx := ctx.MustCreateRpcContextFromCli(c)
+	generator := gogen.NewDefaultRpcGenerator(rpcCtx)
+	rpcCtx.Must(generator.Generate())
+	return nil
+}
+
+func RpcTemplate(c *cli.Context) error {
+	out := c.String("out")
+	idea := c.Bool("idea")
+	generator := gogen.NewRpcTemplate(out, idea)
+	generator.MustGenerate()
+	return nil
+}