fix: add @param JSDoc to WalletSwapNamespace overrides

## Summary

`WalletSwapNamespace.getQuote()` and `WalletSwapNamespace.getQuotes()` override `BaseSwapNamespace` methods but do not carry forward the `@param` JSDoc tags. This causes the auto-generated API reference docs to show empty parameter descriptions for those methods.

## Affected methods

- `WalletSwapNamespace.getQuote(params: SwapQuoteParams)` — override has no `@param` tag; base class has `@param params - Quote parameters (assets, amounts, chain, optional provider)`
- `WalletSwapNamespace.getQuotes(params: SwapQuoteParams)` — same issue

## Expected fix

Add `@param` tags to both overrides in `src/swap/namespaces/WalletSwapNamespace.ts`:

```ts
/**
* Get a swap quote with the wallet address as recipient.
* Ensures calldata is encoded for the real wallet, not a placeholder.
* @param params - Quote parameters (assets, amounts, chain, optional provider)
*/
override async getQuote(params: SwapQuoteParams): Promise
```

## Context

Discovered while generating the Actions SDK swap documentation for [docs.optimism.io](https://docs.optimism.io/app-developers/reference/actions/swap-documentation).