docs: Update CLAUDE.md with three-tier architecture and new providers

- Added new video players: Vidzy, LuLuvid, Uqload
- Added new anime site: French-Manga
- Added new series sites category with FS7
- Updated documentation to reflect three-tier architecture (anime sites → series sites → video players)
- Added BaseSeriesSite interface documentation
- Added "Adding New Series Site" section
- Updated test organization with test_french_manga.py

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via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

app/downloaders/series_sites/__init__.py

@@ -0,0 +1,23 @@
+"""Series streaming sites (catalogs) downloaders"""
+from .base import BaseSeriesSite
+# Import all series site downloaders
+from .fs7 import FS7Downloader
+
+__all__ = [
+    "BaseSeriesSite",
+    "FS7Downloader",
+]
+
+
+def get_series_site(url: str) -> BaseSeriesSite:
+    """Factory function to get the appropriate series site for a URL"""
+    sites = [
+        FS7Downloader(),
+    ]
+
+    for site in sites:
+        if site.can_handle(url):
+            return site
+
+    # Return None if no match (should not happen in normal flow)
+    return None