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/html_test.go

@@ -0,0 +1,50 @@
+package message
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/message/entity"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/message/html"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func TestHTMLBuilder_String(t *testing.T) {
+	ctx := context.Background()
+	sender, mock := testSender(t)
+
+	msg := "abc"
+	send := "<b>" + msg + "</b>"
+	mock.ExpectFunc(func(b bin.Encoder) {
+		req, ok := b.(*tg.MessagesSendMessageRequest)
+		require.True(t, ok)
+		require.Equal(t, &tg.InputPeerSelf{}, req.Peer)
+		require.Equal(t, msg, req.Message)
+		require.NotZero(t, req.Entities)
+		require.Equal(t, &tg.MessageEntityBold{
+			Offset: 0,
+			Length: entity.ComputeLength(msg),
+		}, req.Entities[0])
+	}).ThenResult(&tg.Updates{})
+
+	_, err := sender.Self().StyledText(ctx, html.Format(nil, "<b>%s</b>", msg))
+	require.NoError(t, err)
+
+	mock.ExpectFunc(func(b bin.Encoder) {
+		req, ok := b.(*tg.MessagesSendMessageRequest)
+		require.True(t, ok)
+		require.Equal(t, &tg.InputPeerSelf{}, req.Peer)
+		require.Equal(t, msg, req.Message)
+		require.NotZero(t, req.Entities)
+		require.Equal(t, &tg.MessageEntityBold{
+			Offset: 0,
+			Length: entity.ComputeLength(msg),
+		}, req.Entities[0])
+	}).ThenRPCErr(testRPCError())
+
+	_, err = sender.Self().StyledText(ctx, html.Bytes(nil, []byte(send)))
+	require.Error(t, err)
+}