Enable share folder

Enable sharing of folder by converting to zip.

isDir key is set to tell the receiver that the folder is a zipfile and that extraction needs to be performed on users end (need to be implemented, currently the folder is shared as zip file only).

Share folder option now shows when right clicking the folder. However for using kdeconnect-handler,the path must end with /

Since latest commit there has been error in the sharing of files. So this will work only when that is fixed