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/fileid/photo_size_source_test.go

@@ -0,0 +1,61 @@
+package fileid
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+)
+
+func TestPhotoSizeSourceEncodeDecode(t *testing.T) {
+	tests := []PhotoSizeSource{
+		{
+			Type:   PhotoSizeSourceLegacy,
+			Secret: 10,
+		},
+		{
+			Type:                 PhotoSizeSourceStickerSetThumbnail,
+			StickerSetID:         12,
+			StickerSetAccessHash: 13,
+		},
+		{
+			Type:     PhotoSizeSourceFullLegacy,
+			VolumeID: 13,
+			LocalID:  14,
+			Secret:   15,
+		},
+		{
+			Type:             PhotoSizeSourceDialogPhotoBigLegacy,
+			VolumeID:         13,
+			LocalID:          14,
+			DialogID:         -1001228418968,
+			DialogAccessHash: 15,
+		},
+		{
+			Type:                 PhotoSizeSourceStickerSetThumbnailLegacy,
+			VolumeID:             10,
+			LocalID:              11,
+			StickerSetID:         12,
+			StickerSetAccessHash: 13,
+		},
+		{
+			Type:                 PhotoSizeSourceStickerSetThumbnailVersion,
+			StickerSetID:         12,
+			StickerSetAccessHash: 13,
+			StickerVersion:       1,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.Type.String(), func(t *testing.T) {
+			a := require.New(t)
+			var b bin.Buffer
+
+			tt.encode(&b)
+			var got PhotoSizeSource
+			a.NoError(got.decode(&b, latestSubVersion))
+			a.Equal(tt, got)
+		})
+	}
+}