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/manager_example_test.go

@@ -0,0 +1,61 @@
+package peers_test
+
+import (
+	"context"
+
+	"github.com/go-faster/errors"
+	"go.uber.org/zap"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/peers"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/updates"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func ExampleManager() {
+	logger := zap.NewExample()
+
+	var (
+		dispatcher = tg.NewUpdateDispatcher()
+		h          telegram.UpdateHandler
+	)
+	client, err := telegram.ClientFromEnvironment(telegram.Options{
+		Logger: logger.Named("client"),
+		UpdateHandler: telegram.UpdateHandlerFunc(func(ctx context.Context, u tg.UpdatesClass) error {
+			return h.Handle(ctx, u)
+		}),
+	})
+	if err != nil {
+		panic(err)
+	}
+	peerManager := peers.Options{
+		Logger: logger,
+	}.Build(client.API())
+	gaps := updates.New(updates.Config{
+		Handler:      dispatcher,
+		AccessHasher: peerManager,
+		Logger:       logger.Named("gaps"),
+	})
+	h = peerManager.UpdateHook(gaps)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	if err := client.Run(ctx, func(ctx context.Context) error {
+		if err := peerManager.Init(ctx); err != nil {
+			return err
+		}
+		u, err := peerManager.Self(ctx)
+		if err != nil {
+			return err
+		}
+
+		_, isBot := u.ToBot()
+		if err := gaps.Run(ctx, client.API(), u.ID(), updates.AuthOptions{IsBot: isBot}); err != nil {
+			return errors.Wrap(err, "gaps")
+		}
+		return nil
+	}); err != nil {
+		panic(err)
+	}
+}