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/telethon_extractor/telethon_extractor.py

@@ -9,7 +9,7 @@ from tqdm import tqdm
 import re, time, json, os
 
 from auto_archiver.core import Extractor
-from auto_archiver.core import Metadata, Media, ArchivingContext
+from auto_archiver.core import Metadata, Media
 from auto_archiver.utils import random_str
 
 
@@ -120,7 +120,7 @@ class TelethonArchiver(Extractor):
             media_posts = self._get_media_posts_in_group(chat, post)
             logger.debug(f'got {len(media_posts)=} for {url=}')
 
-            tmp_dir = ArchivingContext.get_tmp_dir()
+            tmp_dir = self.tmp_dir
 
             group_id = post.grouped_id if post.grouped_id is not None else post.id
             title = post.message