ARC-62 - Integration with ARC-28, ARC-64, publish final deployments

"must be used within a useWalletContext" read as if useWalletContext were a
component. Svelte context reaches the component that calls
useWalletContext and its descendants, so say that. useWallet and
useNetwork throw the same error.

"must be used within a useWalletContext" read as if useWalletContext were a
component. Svelte context reaches the component that calls
useWalletContext and its descendants, so say that. useWallet and
useNetwork throw the same error.

@txnlab/use-wallet-passkey derives a post-quantum (Falcon-1024) Algorand
account from a passkey's WebAuthn PRF output, so users need no extension,
app or seed phrase.

- connect() signs in with an existing passkey; connect({ create: true })
  creates one, then evaluates the PRF scoped to it
- Derivation: entropy = PRF output for a frozen per-context label; the
  keygen seed is SHA-512/256("PQK" || "f1" || entropy), as in algokey pq,
  algosdk, Lute and Pera, so the exported 25-word phrase restores the
  same account (pinned by the ARC-76 vectors)
- Every PRF ceremony uses userVerification: 'required'; a credential or
  derived key that doesn't match the stored account fails closed
- The private key lives in a dedicated worker started from a Blob URL
  (inlined at build time, so bundlers need no config); without session it
  is dropped after every request, with session it stays until an idle
  timeout and confirm chooses silent, presence or verify per request
- signTransactions signs with a pqsig; signData supports ARC-60 with
  scheme falcon-1024-det; exportRecoveryPhrase returns the phrase after a
  fresh verified ceremony; only public data is persisted
- Examples: register passkey({ session: true }) and a "Create passkey"
  button in all seven; the React example adds a recovery phrase panel
- e2e: create, sign, authenticate, sign in again and resume, against a
  Chromium virtual authenticator with PRF
- Docs: README, supported wallets, installation and the useWalletManager
  examples