Unable to open readme.html in snap-based applications

[synthfi]

Unable to open the manual with a browser that is packaged with snap because snap applications are beyond stupid

https://askubuntu.com/questions/1263843/how-to-allow-snap-applications-to-access-tmp-folder

I can't put something in the system temp folder and I can't put it into the xdg temp folder because it has to be in the home folder or the snap application's specific temp folder.

Need to figure out a way to handle this. Options:

• make readme.html somehow integrated into PolyGlot itself with an internal web view
• package readme.html with the installer somehow. don't even know if that's possible with jpackage + java

[synthfi]

going with internal webview as that may be useful for rendering markdown in the future