Add more languages to the documentation

[cibernox]

If someone wants to contribute to translate the documentation to more languages, I could use some help.

Having the docs translated into German, French, Portuguese, Chinese and Japanese would cover most of the world's population.

Chinese and Japanese are particularly important as english is not so much of a lingua franca in asia as it is in the west.

Of course, every help is welcomed. The documentations' translation can be found in https://github.com/cibernox/svelte-intl-precompile-docs/tree/main/locales

[tomoam]

Hi, please let me help you. I'll try to translate the documentation into Japanese.

[sastan]

I'll translate to german.