Add Language Support(Chinese)

[TomoriNaoBest]

I add the chinese Language support
add one more menu that can change the language
and can also save the language setttings(I edit the UserSettings part too).

[Kyome22]

@TomoriNaoBest Thanks for your pull request.
Why do you need the diff of RunCat.sln?

Also, if you want to support multiple languages, I think it's better to use Resources.resx.
https://learn.microsoft.com/en-us/dotnet/core/extensions/localization

[TomoriNaoBest]

@TomoriNaoBest Thanks for your pull request. Why do you need the diff of RunCat.sln?

Also, if you want to support multiple languages, I think it's better to use Resources.resx. https://learn.microsoft.com/en-us/dotnet/core/extensions/localization

I didn't have any development experience in the NET framework before, so I just coded it based on my intuition. Perhaps it was a completely wrong writing method. Thank you for your reply, so I will go learn it. (Generated by translation software)

The SLN file may have been automatically modified by my compiler, or perhaps it was due to my improper operation.