Add translations

[Ruben2776]

If you would like to translate PicView, or update an existing translation, please take a look at my guide:

1. Make a fork of this repository
2. Copy en.json from /Config/Languages and rename it to your two letter language code (wiki).
3. Edit the right side values of the xx.json file to your language.
4. Issue a pull request.

Note Shift and Alt are keyboard key names

If you want to test it
not required

1. Open the project with the latest version of Visual Studio or Rider and have the latest .NET SDK installed.
2. Start the app and change the language in the settings window F4.

[Crystal-RainSlide]

For xx-xx / xx_xx (zh-CN / zh_CN for example), should we use - or _?

[Ruben2776]

It should be zh_CN then :)

Update: it should be zh-Ch with dashes instead #114

[sparmark]

I have translated the texts into Swedish, and have attached sv.json to this comment.

Forgive me for not adding it the proper way, but I am not so familiar with github yet. I hope you can still integrate it into your project.

sv.json

[Ruben2776]

@sparmark That's completely okay, thank you very much.

If anyone else has trouble with pull requests and want to update them manually, just remember to copy the latest iteration from the repository, and not your local file.