Feature/server language

[wCATw]

*sry for my English, i use translator

Description

I added the server language input string. Now you can enter your language, and the server will not start in English only.

Motivation and Context

mission strings are loaded depending on the server language.
issue

How Has This Been Tested?

I saved my profile and started the server by entering my native language in the field. The server started in the correct language. I also checked the configuration files - everything was written correctly.
I use Windows 11. I use Rider for development.
I ran all the unit tests and they were green.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.

[jupster]

Will have a look over / test it out hopefully this weekend.

[wCATw]

Detected Issue: after starting the server, language="[lang]" is set to English back

[jupster]

If you don't save before launching the server it likely will stay as the language you set it as. I'll try and get around to checking its code and making possible changes if needed