Get the label playlist example working

This is the first relatively big milestone for me.

examples/label_playlist.py

@@ -0,0 +1,47 @@
+# pylint: disable=missing-module-docstring, missing-function-docstring
+
+from argparse import ArgumentParser
+
+from spotify_actions.album import (
+    album_filter_label,
+    album_sort_release,
+    album_to_simplified,
+    album_to_tracks,
+)
+from spotify_actions.playlist import (
+    playlist_current_user_all,
+    playlist_current_user_assure,
+    playlist_replace,
+)
+from spotify_actions.search import Query, search_albums
+from spotify_actions.util import read_credentials_oauth
+
+
+def main() -> None:
+    parser = ArgumentParser()
+    parser.add_argument("-c", "--credentials", required=True)
+    parser.add_argument("label")
+
+    cmdline = parser.parse_args()
+
+    client = read_credentials_oauth(
+        cmdline.credentials,
+        redirect_uri="https://speice.io/spotify/",
+        scopes=["playlist-read-private", "playlist-modify-private", "playlist-modify-public"],
+    )
+
+    user_playlists = playlist_current_user_all(client)
+    playlists = playlist_current_user_assure(client, user_playlists, cmdline.label)
+    playlist = list(playlists)[0]
+
+    albums_search = search_albums(client, Query(label=cmdline.label))
+    albums_unfiltered = album_to_simplified(client, albums_search)
+    albums_unsorted = album_filter_label(albums_unfiltered, cmdline.label)
+    albums = album_sort_release(albums_unsorted, descending=True)
+    tracks = album_to_tracks(client, albums)
+
+    playlist_replace(client, playlist.spotify_id, tracks)
+
+
+if __name__ == "__main__":
+    main()