Further cleanup

* Removes (partly) the ArchivingOrchestrator
* Removes the cli_feeder module, and makes it the 'default', allowing you to pass URLs directly on the command line, without having to use the cumbersome --cli_feeder.urls. Just do auto-archiver https://my.url.com
* More unit tests
* Improved error handling

src/auto_archiver/modules/csv_feeder/csv_feeder.py

@@ -20,6 +20,4 @@ class CSVFeeder(Feeder):
                     url = row[0]
                     logger.debug(f"Processing {url}")
                     yield Metadata().set_url(url)
-            ArchivingContext.set("folder", "cli")
-
-        logger.success(f"Processed {len(self.urls)} URL(s)")
+            ArchivingContext.set("folder", "cli")