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/cachedgen/gen.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"context"
+	"embed"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"os/signal"
+
+	"github.com/go-faster/errors"
+	"go.uber.org/multierr"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/query/internal/genutil"
+)
+
+//go:embed _template/*.tmpl
+var templates embed.FS
+
+func generate(ctx context.Context, out io.Writer, pkgName string) error {
+	pkg, err := genutil.Load(ctx, "go.mau.fi/mautrix-telegram/pkg/gotd/tg")
+	if err != nil {
+		return errors.Wrap(err, "load")
+	}
+
+	return genutil.WriteTemplate(templates, out, "header", Config{
+		Queries: collect(pkg),
+		Package: pkgName,
+	})
+}
+
+func run(ctx context.Context) (err error) {
+	var out io.Writer = os.Stdout
+
+	set := flag.NewFlagSet("gen", flag.ExitOnError)
+	output := set.String("out", "", "output file")
+	pkgName := set.String("package", "cached", "name of package name to generate")
+	if err := set.Parse(os.Args[1:]); err != nil {
+		return errors.Wrap(err, "parse flags")
+	}
+
+	if *output != "" {
+		f, err := os.Create(*output)
+		if err != nil {
+			return errors.Wrapf(err, "can't create file %q", *output)
+		}
+		defer func() {
+			multierr.AppendInto(&err, f.Close())
+		}()
+		out = f
+	}
+
+	return generate(ctx, out, *pkgName)
+}
+
+func main() {
+	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
+	defer cancel()
+
+	if err := run(ctx); err != nil {
+		fmt.Println(err)
+		return
+	}
+}