Displaying editable audio waveform. Which library should i use?

[StudentScripter]

Hello im currently on a new project where i want to create a simple audio editor which main functions shall be:

-just 1 track but with the possibility to drop in multiple wav or mp3 files into that one timeline
-crossfade and overlap these wavefiles by dragging
-be able to zoom way in or out the waveform
-cut samples at zerocrossings
-export new file

My main questions are:
-which library is good for those tasks
-how to display the waveform/whats best practise to display it and make it zoomable smoothly while also beeing able to move the waveform inside this timeline

Thanks alot.