i18n: hardcoded English UI strings can't be translated

For a localization library, the components ship non-translatable English text:

Component	Strings
`LanguageSwitcher`	`Search...`, `Search languages`, `No results`, `Select language`, `Current language: …`
`PhoneInput`	`Select country`, `Search countries...`, `Search countries`, country names (English only)
`NavBar`	`Select language`, `Current language: …`, `Toggle menu`, `GitHub`

Proposal

Add an optional labels prop per component with typed keys and English defaults, e.g.:

<LanguageSwitcher
  locales={locales}
  labels={{
    search: "Rechercher…",
    noResults: "Aucun résultat",
    listbox: "Choisir la langue",
    current: (name) => `Langue actuelle : ${name}`,
  }}
/>

For PhoneInput country names, consider Intl.DisplayNames with a displayLocale prop.

Acceptance

Exported *Labels types, TSDoc on each key
Docs page section showing a translated example
Tests asserting custom labels render

@sapatmohit

@sapatmohit can I be assigned to this?

I'll follow the approach in the issue: an optional labels prop with English defaults on LanguageSwitcher, PhoneInput, and NavBar, plus tests and a docs example.

Works buddy, assigned to you now

Heads-up before you go further: the redesign (#67, #69, #70, #71) rewrote LanguageSwitcher, PhoneInput, NavBar and TranslationWidget, so please branch from the latest main — work based on the old files will conflict.

It also changed the string inventory:

LanguageSwitcher and PhoneInput now accept searchPlaceholder and emptyMessage; fold those into labels or keep them as aliases.
New hardcoded strings: "Clear search" (switcher, phone input), "Search languages" / "Select language" / "Current language: …" (switcher, navbar), and in TranslationWidget "Swap languages", "Copy translation", "Clear source text", "Translation copied to clipboard" and the character-count text.
LocaleNumber and RelativeTime were removed (feat!: remove formatters and rebuild docs preview and demos #72), so they're out of scope.

Thanks for picking this up.

feat: translatable UI labels for LanguageSwitcher, PhoneInput, NavBar…

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i18n: hardcoded English UI strings can't be translated #30