feat: add type alias support

Author: klaidliadon

_examples/hello-webrpc/hello-api.ridl

@@ -7,6 +7,9 @@ enum Kind: uint32
   - USER = 1
   - ADMIN = 2
 
+type Username: string
+type Age: uint32
+
 struct Empty
 
 struct User

_examples/hello-webrpc/webapp/client.gen.js

@@ -1,6 +1,6 @@
-// hello-webrpc v1.0.0 7037367a376940060eaf2739a920c4dca4a6dc2e
+// hello-webrpc v1.0.0 949b00a8db9810c69295f9dd9f02587a65d3c497
 // --
-// Code generated by webrpc-gen@v0.32.3 with ../../ generator. DO NOT EDIT.
+// Code generated by webrpc-gen@v0.36.1-5-g76cb402 with ../../ generator. DO NOT EDIT.
 //
 // webrpc-gen -schema=hello-api.ridl -target=../../ -exports=false -client -out=./webapp/client.gen.js
 
@@ -11,12 +11,16 @@ const WebRPCVersion = "v1"
 const WebRPCSchemaVersion = "v1.0.0"
 
 // Schema hash generated from your RIDL schema
-const WebRPCSchemaHash = "7037367a376940060eaf2739a920c4dca4a6dc2e"
+const WebRPCSchemaHash = "949b00a8db9810c69295f9dd9f02587a65d3c497"
 
 //
 // Types
 //
 
+// type Username = string
+
+// type Age = uint32
+
 var Kind;
 (function (Kind) {
   Kind["USER"] = "USER"

types.go.tmpl

@@ -19,6 +19,10 @@
 })({{$enumName}} || ({{$enumName}} = {}))
 {{end -}}
 
+{{- if isAliasType $type }}
+// type {{$type.Name}} = {{$type.Type}}
+{{end -}}
+
 {{- if isStructType $type }}
 {{if $opts.exports}}export {{end}}class {{.Name}} {
   constructor(_data) {