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/query/internal/genutil/write.go

@@ -0,0 +1,35 @@
+package genutil
+
+import (
+	"bytes"
+	"go/format"
+	"io"
+	"io/fs"
+	"os"
+	"text/template"
+
+	"github.com/go-faster/errors"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/gen"
+)
+
+// WriteTemplate loads template from FS and executes it to given output writer.
+func WriteTemplate(source fs.FS, out io.Writer, name string, data interface{}) error {
+	tmpl := template.New("templates").Funcs(gen.Funcs())
+	tmpl = template.Must(tmpl.ParseFS(source, "_template/*.tmpl"))
+	var buf bytes.Buffer
+	if err := tmpl.ExecuteTemplate(&buf, name, data); err != nil {
+		return errors.Wrap(err, "template")
+	}
+
+	formatted, err := format.Source(buf.Bytes())
+	if err != nil {
+		if _, cpyErr := io.Copy(os.Stdout, &buf); cpyErr != nil {
+			return errors.Wrapf(cpyErr, "dump generated (original error: %v)", err)
+		}
+		return errors.Wrap(err, "format")
+	}
+
+	_, err = out.Write(formatted)
+	return err
+}