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/request.go

@@ -0,0 +1,63 @@
+package message
+
+import (
+	"context"
+
+	"github.com/go-faster/errors"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+// RequestBuilder is an intermediate builder to make different RPC calls using Sender.
+type RequestBuilder struct {
+	Builder
+}
+
+// Reaction sends reaction for given message.
+func (b *RequestBuilder) Reaction(ctx context.Context, msgID int, reaction ...tg.ReactionClass) (tg.UpdatesClass, error) {
+	p, err := b.peer(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "peer")
+	}
+
+	upd, err := b.sender.sendReaction(ctx, p, msgID, reaction...)
+	if err != nil {
+		return nil, errors.Wrap(err, "send reaction")
+	}
+
+	return upd, nil
+}
+
+// ScreenshotNotify sends notification about screenshot.
+// Parameter msgID is an ID of message that was screenshotted, can be 0.
+func (b *RequestBuilder) ScreenshotNotify(ctx context.Context, msgID int) (tg.UpdatesClass, error) {
+	p, err := b.peer(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "peer")
+	}
+
+	upd, err := b.sender.sendScreenshotNotification(ctx, &tg.MessagesSendScreenshotNotificationRequest{
+		Peer:    p,
+		ReplyTo: &tg.InputReplyToMessage{ReplyToMsgID: msgID},
+	})
+	if err != nil {
+		return nil, errors.Wrap(err, "send screenshot notify")
+	}
+
+	return upd, nil
+}
+
+// PeerSettings returns peer settings.
+func (b *RequestBuilder) PeerSettings(ctx context.Context) (*tg.PeerSettings, error) {
+	p, err := b.peer(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "peer")
+	}
+
+	r, err := b.sender.getPeerSettings(ctx, p)
+	if err != nil {
+		return nil, errors.Wrap(err, "get peer settings")
+	}
+
+	return &r.Settings, nil
+}