fix: recently added items sort order in the homepage

.ie. stop relying on folder last mod date, and use the latest file from the folder

+ bump watchdog to v4
+ add WIP docs (stashed in .github/code.docs for now)

.github/changelog.md

@@ -1,19 +1,13 @@
 # What's New?
 
-- Silence removal: Remove silence less than -40 dB between tracks
-- Crossfade (labeled experimental on Firefox, because some tracks stutter when crossfade ends)
-- Automatic preloading of next track, meaning reduced delay between tracks. Impact most noticable on reverse proxy.
-- Quick settings on settings page
-- CTRL + B to toggle right sidebar
-- Remove from queue option in track context menu in Now playing page
-- Add Playlists and favorites to Browse section of homepage
-- Add right click menu option to search track on Youtube, Spotify, etc.
+- New no sidebar layout
 
 # Bug fixes
 
-- Tracks not being removed from queue when you click the ✕ button
-- Consistent design on playlist list page
-- Playlist cards are now larger on playlist list page
-- Save queue as playlist now works as expected
-- Keyboard shortcuts not working on first attempt
-- Misc. code improvements
+- Fix recently added items not filling row
+-
+
+# Development
+
+- Move to [waitress](https://docs.pylonsproject.org/projects/waitress/en/stable/) WSGI server
+- Add documentation to `.github/docs`. Contributions are welcome!