move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/cmd/mtprint/printer_test.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/mt"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/proto/codec"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func Test_readAndPrint(t *testing.T) {
+	c := codec.Intermediate{}
+
+	input := &bytes.Buffer{}
+	buf := &bin.Buffer{}
+
+	objects := []bin.Object{
+		&mt.RPCResult{},
+		&mt.RPCError{},
+		&tg.CodeSettings{},
+	}
+	for _, o := range objects {
+		buf.Reset()
+		require.NoError(t, o.Encode(buf))
+		require.NoError(t, c.Write(input, buf))
+	}
+
+	output := &bytes.Buffer{}
+	require.NoError(t, NewPrinter(input, formats("go"), c).Print(output))
+	out := output.String()
+	require.Contains(t, out, "RPCResult")
+	require.Contains(t, out, "RPCError")
+	require.Contains(t, out, "CodeSettings")
+}