Add support for multipart upload and custom form data

[riderx]

Right now the plugin only support binary upload, would be nice to have multipart as well

[Saqib92]

I have Found a temporary solution for formData() usage:

const fileUrl = await CameraPreview.stopRecordVideo();
console.log(fileUrl); // your file URL

let myFileAsBlob:any = Capacitor.convertFileSrc(`file://${fileUrl.videoFilePath}`);    
let finalFile:any = await fetch(myFileAsBlob).then(r => r.blob());
console.log(finalFile);

finalFile.name = Date.now() + '.' + finalFile.type.split('/')[1];
console.log(finalFile); // file as blob with name and type

const formData = new FormData();
formData.append('YourServerFileKey, finalFile); // upload to your server.