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/uploader/progress.go

@@ -0,0 +1,25 @@
+package uploader
+
+import "context"
+
+// ProgressState represents upload state change.
+type ProgressState struct {
+	// ID of upload.
+	ID int64
+	// Name of uploading file.
+	Name string
+	// Part is an ID of uploaded part.
+	Part int
+	// PartSize is a size of uploaded part.
+	PartSize int
+	// Uploaded is a total sum of uploaded bytes.
+	Uploaded int64
+	// Total is a total size of uploading file.
+	// May be equal to -1, in case when Upload created without size (stream upload).
+	Total int64
+}
+
+// Progress is interface of upload process tracker.
+type Progress interface {
+	Chunk(ctx context.Context, state ProgressState) error
+}