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/geo_point.go

@@ -0,0 +1,15 @@
+package message
+
+import "go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+
+// GeoPoint adds geo point attachment.
+// NB: parameter accuracy may be zero and will not be used.
+func GeoPoint(lat, long float64, accuracy int, caption ...StyledTextOption) MediaOption {
+	return Media(&tg.InputMediaGeoPoint{
+		GeoPoint: &tg.InputGeoPoint{
+			Lat:            lat,
+			Long:           long,
+			AccuracyRadius: accuracy,
+		},
+	}, caption...)
+}