Localization

[WarningImHack3r]

Add localization with Inlang, because we're lacking SvelteKit's native mechanism and that Inlang is (will be?) great.

Features

• Translation of texts, but also aria-* stuff and alt/accessibility props
• Dedicated JSON files
• Footer toggle, reflecting the current applied language, to switch between both
• Storage of current or overridden language in localStorage
• Instant switch without reload

Bonus

• (Yet another) CI step to check for updates of sdk-js inside of inlang.config.js and update if the version is not the same as the one installed with pnpm
  • Add JS script & package.json script for that
• Add c function in $ts/inlang-color.ts to replace [] by <span class="text-dominant"></span> with Svelte's {@html ...} (customizable class)
• Make RadioButtonsGroup values mandatory and add optional hoverValues to change the value on hover
  • Use it to add auto-generated flag emojis on hover on the language selector
• Adjust the footer Solutions list to match recent changes

Left to do

• Don't require page refresh for nested keys in objects