Support locale option for variables title in outline

[F0rgenet]

I added locales support for variable title in default styles outlines

/// `local-names: (parameters: [Paramètres], default: [Défault], variables: [Alterné])`.
/// -> dictionary
local-names: (parameters: [Parameters], default: [Default], variables: [Variables])

Closes #47

However it seems to me that supporting #set text(lang: ...) will be full solution, this one is partial

[Mc-Zen]

Hi @F0rgenet ,

thank you, I had missed this! I also see a a better solution in the future but it is not trivial because for once I don't know these words in all existing languages and there might be variations in certain languages and the user wants to select...

[F0rgenet]

Im preparing another PR in this topic, it will add #set text(lang: ...) support, i asked AI to translate those words to all typst supported languages (AI is good at translating), i think this might work, will open PR shortly, need to discuss some things about it

Also I have a question, will it be better as separate PR or I can update this one?

[Mc-Zen]

Oh, I'm curious! Mind that there still needs to be a way to set the word manually in case someone wants a special version.

Actually, sooner or later, Tidy will get an overhaul with types that one can use set and show rules on. This will change the entire picture including how themes are built. But we can still work on this now because it might still take a while until Typst gets user-defined types.

Let's do a separate PR! lt will be cleaner this way and then we can decide which one(s) to merge.
So should I wait to merge this one?

[F0rgenet]

Waiting for custom types too

[Mc-Zen]

I will merge this one now, regardless of how we go with #49 because it is easy while the other one might need more time/discussion and they are compatible.