0.1.0

First release.

• One Looot client for the looot REST API. Foundation only, async on every call.
• Core methods: catalogOverview, publicCatalog, publicCatalogItem, search, inspect,
  run, runJob, getRun, listRuns, cancelRun, runAttempts, balance.
• Extended methods: discover, catalogEndpoints, comparePublicCatalog, whoami,
  listTopUps, ledger, capabilityRequest, downloadMedia.
• Helpers: waitForRun (polls 1 s to 5 s) and allRuns (an AsyncThrowingStream over every page).
• Codable response types that keep unknown keys through a JSONValue enum.
• LoootError for every non-2xx answer, missing token, network error and timeout, with code,
  retryable, retryHint, retryAfterSeconds and the 402 topUp link.
• Retries 429, retryable 503s, network errors and timeouts twice by default with the same
  idempotency key. maxRetries: 0 turns them off.
• Injectable HTTPTransport so tests mock HTTP. The default uses URLSession.
• Sends User-Agent: looot-swift/0.1.0 swift/<version> and, with agent:, X-Looot-Agent.