Replaced FileSaver with JSaver for windows support

[Tamunorth]

This is a fix for #11

[JideGuru]

Sadly I currently do not own a Windows computer so I can't really review the windows part😢.
Please add a short video showing what you just fixed. Thanks

[Tamunorth]

2023-01-08.20-37-56_Trim.mp4

[Tamunorth]

@JideGuru Sorry i didn't respond earlier, I missed the mail from github, The app on the left is the current master branch, when export is tapped noting happens on windows, the one on the left actually works which is the fix.

[JideGuru]

@Tamunorth Really good work on the PR but I have some comments

the JSaver plugin doesn't seem to support MacOS

But file_saver seems to support both Windows and MacOS.

Perhaps we need to do a little config to allow file_saver to work on windows? or maybe we need to update the plugin? It'll be nice if you can help with this.

[JideGuru]

Closed as Stale

[ArchitMukherjee]

I am working on a Windows laptop and debugging on an Android emulator. Initially the drawing board was not getting saved, but I used FileSaver.instance.saveAs(...) instead of FileSaver.instance.saveFile(...) and it worked.