v0.5.0

Added

• track find --title <title> --artist <artist> — exact-match track resolver. Builds Spotify's track:"X" artist:"Y" filter and returns the top match (same shape as spotify track <id>). Exits with NOT_FOUND (code 3) when nothing matches, instead of returning the personalized best-guess that spotify search would surface.
• playlist add and playlist remove accept --uris-file <path> (one URI/ID/query per line; blank lines and # comments allowed) and read URIs from stdin when - is passed as a positional. Positional, file, and stdin sources concatenate. Eliminates shell-quoting hazards (zsh non-splitting unquoted vars, xargs choking on apostrophes in titles like Don't Stop Believin') when driving the CLI from a list-in-a-file.