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/updates/internal/e2e/peer_db.go

@@ -0,0 +1,48 @@
+package e2e
+
+import "go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+
+type messageDatabase struct {
+	common   []tg.MessageClass
+	secret   []tg.EncryptedMessageClass
+	channels map[int64][]tg.MessageClass
+}
+
+type peerDatabase struct {
+	users    map[int64]*tg.User
+	chats    map[int64]*tg.Chat
+	channels map[int64]*tg.Channel
+
+	id int64
+}
+
+func (p *peerDatabase) createUser(username string) *tg.PeerUser {
+	p.users[p.id] = &tg.User{
+		ID:       p.id,
+		Username: username,
+	}
+
+	defer func() { p.id++ }()
+	return &tg.PeerUser{UserID: p.id}
+}
+
+func (p *peerDatabase) createChat(title string) *tg.PeerChat {
+	p.chats[p.id] = &tg.Chat{
+		ID:    p.id,
+		Title: title,
+	}
+
+	defer func() { p.id++ }()
+	return &tg.PeerChat{ChatID: p.id}
+}
+
+func (p *peerDatabase) createChannel(username string) *tg.PeerChannel {
+	p.channels[p.id] = &tg.Channel{
+		ID:       p.id,
+		Username: username,
+	}
+	p.channels[p.id].SetAccessHash(p.id * 2)
+
+	defer func() { p.id++ }()
+	return &tg.PeerChannel{ChannelID: p.id}
+}