Move pages under tldr, lint run.sh, update docs

tldr/spotdl

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# spotdl
+
+> Download Spotify playlists and songs along with metadata.
+> More information: <https://github.com/spotDL/spotify-downloader>.
+
+- Download songs from the provided URLs and embed metadata:
+
+`spotdl {{open.spotify.com/playlist/playlistId open.spotify.com/track/trackId ...}}`
+
+- Start a web interface to download individual songs:
+
+`spotdl web`
+
+- Save only the metadata without downloading anything:
+
+`spotdl save {{open.spotify.com/playlist/playlistId ...}} --save-file {{path/to/save_file.spotdl}}`