feat(download screen):implement download capabilities

fastanime/Model/download_screen.py

@@ -5,3 +5,17 @@ class DownloadsScreenModel(BaseScreenModel):
     """
     Handles the download screen logic
     """
+
+    def update_download_progress(self, d):
+        print(
+            d["filename"],
+            d["downloaded_bytes"],
+            d["total_bytes"],
+            d.get("total_bytes"),
+            d["elapsed"],
+            d["eta"],
+            d["speed"],
+            d.get("percent"),
+        )
+        if d["status"] == "finished":
+            print("Done downloading, now converting ...")