feat[i18n]: add ide extension config

[NilsJacobsen]

let me know what needs to be changed in order to merge this

Description: DX upgrade with little i18n tool.

• I added a ide-extension config to terriajs. This enables developers and contributors to extract, access and update translations in code using the existing json files under the hood.

• Opt-in: With the config in place you can also use the fink editor to update product copy/translation with a no code UI. Here u see an example from my fork: https://inlang.com/editor/github.com/NilsJacobsen/terriajs

What I added (opt-in)

• A config file -> settings.json
• Vscode recommendation so the contributors can use the extension

Screenshots:

IDE-Extension:

Editor:

[CLAassistant]

All committers have signed the CLA.

[NilsJacobsen]

Is there an update on this? I saw that the config is a bot outdated should I update it?