fix: avoid creating a new WC connector on page reload (when already connected)

[agualis]

Fixes https://github.com/rainbow-me/rainbowkit/issues/2232

Uses localStorage to know if there is an existing Wallet Connect connection after reloading the page. If yes, it avoids creating a new Wallet Connect connector ({ ...config, showQrModal: false }) which was leading to broken connection (with Error: No matching key. history: <number> error.).

The bug could be reproduced in the linked issue or in the the default rainbowkit example (Running pnpm run dev and following the reproduction steps in the linked issue).

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[pyyding]

lgtm