Turn cli_feeder *back* into a module, it's better like this for settings etc, documentation etc.

src/auto_archiver/modules/cli_feeder/cli_feeder.py

@@ -0,0 +1,16 @@
+from loguru import logger
+
+from auto_archiver.core.feeder import Feeder
+from auto_archiver.core.metadata import Metadata
+
+class CLIFeeder(Feeder):
+
+    def __iter__(self) -> Metadata:
+        urls = self.config['urls']
+        for url in urls:
+            logger.debug(f"Processing {url}")
+            m = Metadata().set_url(url)
+            m.set_context("folder", "cli")
+            yield m
+
+        logger.success(f"Processed {len(urls)} URL(s)")