Add a search.text example for catalog search

[TDanks2000]

Background

The examples show search.id for TMDB ID lookup, but many apps start from a typed search box before they have an external ID.

Proposed change

Add an example that searches movies and shows with trakt.search.text, including fields, pagination, and optional extended query options.

Acceptance criteria

• Example uses trakt.search.text(["movie", "show"], "dune", ...).
• The example shows how to read result.movie or result.show safely.
• The example mentions pagination metadata returned from the wrapper.
• bun run verify passes.

Files likely involved

• docs/examples.md
• src/endpoints/search.ts