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/peers/bot_test.go

@@ -0,0 +1,56 @@
+package peers
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func TestBot_BotInfo(t *testing.T) {
+	a := require.New(t)
+	ctx := context.Background()
+	mock, m := testManager(t)
+
+	u := m.User(&tg.User{
+		Bot:        true,
+		ID:         10,
+		AccessHash: 10,
+		Username:   "thebot",
+	})
+	b, ok := u.ToBot()
+	a.True(ok)
+
+	input := u.InputUser()
+	mock.ExpectCall(&tg.UsersGetFullUserRequest{ID: input}).ThenRPCErr(getTestError())
+
+	_, err := b.BotInfo(ctx)
+	a.Error(err)
+
+	testUserFull := getTestUserFull()
+	testUserFull.ID = u.raw.ID
+	{
+		i := tg.BotInfo{
+			UserID:      u.raw.ID,
+			Description: "Test bot",
+			Commands:    nil,
+			MenuButton:  &tg.BotMenuButtonDefault{},
+		}
+		i.SetFlags()
+		testUserFull.SetBotInfo(i)
+	}
+	mock.ExpectCall(&tg.UsersGetFullUserRequest{ID: input}).ThenResult(&tg.UsersUserFull{
+		FullUser: testUserFull,
+	})
+
+	info, err := b.BotInfo(ctx)
+	a.NoError(err)
+	a.Equal(testUserFull.BotInfo, info)
+
+	// Test caching
+	info, err = b.BotInfo(ctx)
+	a.NoError(err)
+	a.Equal(testUserFull.BotInfo, info)
+}