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/gen/example/tl_update_gen.go

@@ -0,0 +1,184 @@
+// Code generated by gotdgen, DO NOT EDIT.
+
+package td
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sort"
+	"strings"
+
+	"go.uber.org/multierr"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tdjson"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tdp"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tgerr"
+)
+
+// No-op definition for keeping imports.
+var (
+	_ = bin.Buffer{}
+	_ = context.Background()
+	_ = fmt.Stringer(nil)
+	_ = strings.Builder{}
+	_ = errors.Is
+	_ = multierr.AppendInto
+	_ = sort.Ints
+	_ = tdp.Format
+	_ = tgerr.Error{}
+	_ = tdjson.Encoder{}
+)
+
+// Update represents TL type `update#b03e2ef8`.
+//
+// See https://localhost:80/doc/constructor/update for reference.
+type Update struct {
+	// Msg field of Update.
+	Msg AbstractMessageClass
+	// Delay field of Update.
+	Delay int32
+}
+
+// UpdateTypeID is TL type id of Update.
+const UpdateTypeID = 0xb03e2ef8
+
+// Ensuring interfaces in compile-time for Update.
+var (
+	_ bin.Encoder     = &Update{}
+	_ bin.Decoder     = &Update{}
+	_ bin.BareEncoder = &Update{}
+	_ bin.BareDecoder = &Update{}
+)
+
+func (u *Update) Zero() bool {
+	if u == nil {
+		return true
+	}
+	if !(u.Msg == nil) {
+		return false
+	}
+	if !(u.Delay == 0) {
+		return false
+	}
+
+	return true
+}
+
+// String implements fmt.Stringer.
+func (u *Update) String() string {
+	if u == nil {
+		return "Update(nil)"
+	}
+	type Alias Update
+	return fmt.Sprintf("Update%+v", Alias(*u))
+}
+
+// TypeID returns type id in TL schema.
+//
+// See https://core.telegram.org/mtproto/TL-tl#remarks.
+func (*Update) TypeID() uint32 {
+	return UpdateTypeID
+}
+
+// TypeName returns name of type in TL schema.
+func (*Update) TypeName() string {
+	return "update"
+}
+
+// TypeInfo returns info about TL type.
+func (u *Update) TypeInfo() tdp.Type {
+	typ := tdp.Type{
+		Name: "update",
+		ID:   UpdateTypeID,
+	}
+	if u == nil {
+		typ.Null = true
+		return typ
+	}
+	typ.Fields = []tdp.Field{
+		{
+			Name:       "Msg",
+			SchemaName: "msg",
+		},
+		{
+			Name:       "Delay",
+			SchemaName: "delay",
+		},
+	}
+	return typ
+}
+
+// Encode implements bin.Encoder.
+func (u *Update) Encode(b *bin.Buffer) error {
+	if u == nil {
+		return fmt.Errorf("can't encode update#b03e2ef8 as nil")
+	}
+	b.PutID(UpdateTypeID)
+	return u.EncodeBare(b)
+}
+
+// EncodeBare implements bin.BareEncoder.
+func (u *Update) EncodeBare(b *bin.Buffer) error {
+	if u == nil {
+		return fmt.Errorf("can't encode update#b03e2ef8 as nil")
+	}
+	if u.Msg == nil {
+		return fmt.Errorf("unable to encode update#b03e2ef8: field msg is nil")
+	}
+	if err := u.Msg.Encode(b); err != nil {
+		return fmt.Errorf("unable to encode update#b03e2ef8: field msg: %w", err)
+	}
+	b.PutInt32(u.Delay)
+	return nil
+}
+
+// Decode implements bin.Decoder.
+func (u *Update) Decode(b *bin.Buffer) error {
+	if u == nil {
+		return fmt.Errorf("can't decode update#b03e2ef8 to nil")
+	}
+	if err := b.ConsumeID(UpdateTypeID); err != nil {
+		return fmt.Errorf("unable to decode update#b03e2ef8: %w", err)
+	}
+	return u.DecodeBare(b)
+}
+
+// DecodeBare implements bin.BareDecoder.
+func (u *Update) DecodeBare(b *bin.Buffer) error {
+	if u == nil {
+		return fmt.Errorf("can't decode update#b03e2ef8 to nil")
+	}
+	{
+		value, err := DecodeAbstractMessage(b)
+		if err != nil {
+			return fmt.Errorf("unable to decode update#b03e2ef8: field msg: %w", err)
+		}
+		u.Msg = value
+	}
+	{
+		value, err := b.Int32()
+		if err != nil {
+			return fmt.Errorf("unable to decode update#b03e2ef8: field delay: %w", err)
+		}
+		u.Delay = value
+	}
+	return nil
+}
+
+// GetMsg returns value of Msg field.
+func (u *Update) GetMsg() (value AbstractMessageClass) {
+	if u == nil {
+		return
+	}
+	return u.Msg
+}
+
+// GetDelay returns value of Delay field.
+func (u *Update) GetDelay() (value int32) {
+	if u == nil {
+		return
+	}
+	return u.Delay
+}