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/_template/main.tmpl

@@ -0,0 +1,31 @@
+{{- /*gotype: go.mau.fi/mautrix-telegram/pkg/gotd/gen.config*/ -}}
+
+{{ define "main" }}
+{{ $pkg := $.Package }}
+{{ template "header" $ }}
+
+{{ range $s := $.Structs }}
+{{ template "struct" $s }}
+{{ template "zero_derive" $s }}
+{{ template "string_derive" $s }}
+{{ if $.Flags.Mapping }}{{ template "fill_from" $s }}{{ end }}
+{{ template "type_info" $s }}
+{{ template "set_flags" $s }}
+{{ template "encode" $s }}
+{{ template "decode" $s }}
+{{- if $.Flags.TDLibJSON }}
+{{ template "encode_tdlib_json" $s }}
+{{ template "decode_tdlib_json" $s }}
+{{- end }}
+{{ if $.Flags.GetSet }}{{ template "getset" $s }}{{ end }}
+{{ if $.Flags.Mapping }}{{ template "field_mapping" newStructConfig ($s) ($) }}{{ end }}
+{{ if $.Flags.Client }}{{ template "method" $s }}{{ end }}
+{{ end }}
+
+{{ range $f := $.Interfaces }}
+{{ template "interface" newInterfaceConfig ($f) ($) }}
+{{ if $.Flags.Mapping }}{{ template "interface_mapping" $f }}{{ end }}
+{{ template "box" newInterfaceConfig ($f) ($) }}
+{{ end }}
+
+{{- end }}