sqlc: add SearchArtists for Subsonic search3 (#295)

internal/db/queries/artists.sql

@@ -18,3 +18,9 @@ SELECT * FROM artists WHERE name = $1 LIMIT 1;
 
 -- name: ListArtists :many
 SELECT * FROM artists ORDER BY sort_name;
+
+-- name: SearchArtists :many
+SELECT * FROM artists
+WHERE name ILIKE '%' || $1 || '%'
+ORDER BY sort_name
+LIMIT $2 OFFSET $3;