docs(sdk): fix executeSwapQuote step name and getSwapQuote route example

[devtechedge]

Summary

Fixes two copy-paste errors in the SDK docs that lead integrators to write code that does not type-check or never matches progress callbacks.

1. executeSwapQuote README used the wrong progress step

In packages/sdk/README.md, the onProgress example checked for progress.step === "deposit". That step exists on the non-swap executeQuote path, but SwapTransactionProgress only defines "approve", "swap", and "fill".

This PR updates the example to use "swap" (and adjusts the nearby comment so it matches).

2. getSwapQuote JSDoc example omitted the route object

In packages/sdk/src/client.ts, the executeSwapQuote JSDoc example called getSwapQuote with originChainId, destinationChainId, inputToken, and outputToken at the top level. GetSwapQuoteParams requires those fields under a route object.

This PR nests those fields under route so the documented call matches the real API.

Generated Typedoc output (if present) can be refreshed on the next docs build from the updated JSDoc.

Test plan

• Confirm README executeSwapQuote example uses step === "swap"
• Confirm client.ts JSDoc getSwapQuote example nests chain/token fields under route
• Spot-check against SwapTransactionProgress and GetSwapQuoteParams types

Fixes #267

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