perf(musics in playlist):change ds to queue

feat: add id_generator

feat(dels):add a new function to delete musics with target singer

refactor(cls):now cls delete all items

refactor(countw , searchw):change ds

fix(buggs)

fix(buggs)

refactor(playlist):change DS to stack

refactor(countw):change DS of find_music_by_id to Stack

fix(bugs),refactor(findms):change DS to stack

fix(delms):add a new stack to delete from history

fix(delms):add a new stack to delete from playlist

feat(paym,undo_playm):designed by stack DS

refactor(playlist): change array DS to stack DS

feat(countw)