[feat] Add Korean as available language for NSIS installers

[Raphiiko]

Describe the problem

In my tauri.conf.json, I have Dutch, Japanese and Korean configured as languages under tauri.bundle.windows.nsis.languages. However when building the following error shows for each of these languages when they are included, when bundling the installer:

Error failed to bundle project: Language (Korean/Japanese/Dutch) not implemented. If it is a valid language listed on <https://github.com/kichik/nsis/tree/9465c08046f00ccb6eda985abbdbf52c275c6c4d/Contrib/Language%20files>, please open a Tauri feature request

The three of these languages are all included in the list at the URL given in the error message.

Describe the solution you'd like

I would like to see support added for these three languages, as this would allow me to switch to a single multi-language installer.

Alternatives considered

No response

Additional context

No response

[FabianLars]

In case you speak any of these languages: My comment in #6852 (comment) applies here too:

for a language to be actually supported we need someone from the community that speaks the requested language to translate Tauri specific strings: https://github.com/tauri-apps/tauri/tree/dev/tooling/bundler/src/bundle/windows/templates/nsis-languages

Contributions much appreciated :)

[Raphiiko]

I'm afraid Dutch is the only language I can help out with. I've submitted a PR to add support for it in #6907.

[nathan-fall]

As a Japanese speaker, I created a Japanese translation. #6940