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/internal/mkentity/entity.go

@@ -0,0 +1,43 @@
+package main
+
+const entityTmpl = `// Code generated by mkentity, DO NOT EDIT.
+package {{ $.PackageName }}
+
+import (
+	"context"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+var (
+	_ = tg.Invoker(nil)
+	_ = context.Context(nil)
+)
+
+{{- /*gotype: go.mau.fi/mautrix-telegram/pkg/gotd/telegram/message/internal/mkrun.Config*/ -}}
+{{- range $typ := $.Data }}
+{{ $helperName := trimPrefix ( trimPrefix $typ.Name "Input" ) "MessageEntity" -}}
+// {{ $helperName }} creates Formatter of {{ $helperName }} message entity.
+//
+// See https://core.telegram.org/constructor/{{ $typ.SchemaType.Name }}.
+func {{ $helperName }}({{- range $f := $typ.Fields }}{{ lowerFirst $f.Name }} {{ $f.Type }}{{- end }}) Formatter {
+	return func(offset, length int) tg.MessageEntityClass {
+		return &tg.{{ $typ.Name }}{
+			Offset: offset,
+			Length: length,
+			{{- range $f := $typ.Fields }}
+			{{ $f.Name }}: {{ lowerFirst $f.Name }},
+			{{- end }}
+		}
+	}
+}
+
+// {{ $helperName }} adds and formats message as {{ $helperName }} message entity.
+//
+// See https://core.telegram.org/constructor/{{ $typ.SchemaType.Name }}.
+func (b *Builder) {{ $helperName }}(s string,
+{{- range $f := $typ.Fields }}{{ lowerFirst $f.Name }} {{ $f.Type }}{{- end }}) *Builder {
+	return b.Format(s, {{ $helperName }}({{- range $f := $typ.Fields }}{{ lowerFirst $f.Name }},{{- end }}))
+}
+{{- end }}
+`