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/telegram/message/draft_test.go

@@ -0,0 +1,37 @@
+package message
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/message/styling"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func TestDraft(t *testing.T) {
+	ctx := context.Background()
+	sender, mock := testSender(t)
+
+	mock.ExpectCall(&tg.MessagesSaveDraftRequest{
+		Peer:    &tg.InputPeerSelf{},
+		Message: "text",
+	}).ThenTrue()
+	mock.ExpectCall(&tg.MessagesSaveDraftRequest{
+		Peer:    &tg.InputPeerSelf{},
+		Message: "styled text",
+		Entities: []tg.MessageEntityClass{
+			&tg.MessageEntityBold{
+				Length: len("styled text"),
+			},
+		},
+	}).ThenTrue()
+	mock.ExpectCall(&tg.MessagesSaveDraftRequest{
+		Peer: &tg.InputPeerSelf{},
+	}).ThenTrue()
+
+	require.NoError(t, sender.Self().SaveDraft(ctx, "text"))
+	require.NoError(t, sender.Self().SaveStyledDraft(ctx, styling.Bold("styled text")))
+	require.NoError(t, sender.Self().ClearDraft(ctx))
+}