enssdk: `UserInputName` / `UserInputLabel` types

[shrugs]

spec via #1908 (comment) and #1908 (comment)

the gist is to introduce a UserInputName/UserInputLabel type with special interpretation logic, replacing the current literalNameToInterpretedName and its usage in <EnsureInterpretedName />

[shrugs]

Note from #2050: with beautifyInterpretedName now wired into the example app, beautified results displayed in SearchView aren't round-trippable as input to Query.domains(where: { name }) (which parses name as an InterpretedName via parsePartialInterpretedName). e.g. pasting ♾️♾️♾️♾️.eth from a result back into the search box throws.

Per-thread context:

• feat: beautifyInterpretedName helper + example usage #2050 (comment) (Copilot)
• feat: beautifyInterpretedName helper + example usage #2050 (comment) (Vercel VADE)

When UserInputName / UserInputLabel types land, the search input boundary should unbeautify before constructing the InterpretedName for lookup.