supabase / auth-js / 14272969242

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feat: add `signInWithWeb3` with solana (#1037)

Adds `signInWithWeb3` which allows [sign in with
Solana](https://github.com/supabase/auth/pull/1918).

**Example usage**

First [connect to the user's
wallet](https://solana.com/developers/courses/intro-to-solana/interact-with-wallets)
then:

```tsx
const wallet = useWallet()

<Button onClick={() => {
  await supabase.auth.signInWithWeb3({ chain: 'solana', wallet, statement: "Custom message" })
}}>
  Sign in with Solana
</Button>
```

It also works without Wallet Standard, at least with Phantom, Solflare
and Brave by reading the `window.solana` object or you can custom send a
wallet object that satisfies the `signIn()` or `signMessage()` APIs.

Additionally you can sign the message yourself and send it via the raw
API:

```typescript
await supabase.auth.signInWithWeb3({
  chain: 'solana',
  message: 'supabase.com wants you to sign in with your Solana account:\n...',
  signature: signatureUint8Array,
})
```

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