Support ESM import of @metamask/eth-sig-util in @trezor/connect-plugin-ethereum

[superKalo]

In a Manifest V3 environment (browser extension), @metamask/eth-sig-util v7 (and probably v8) (ESM-only), a dep of @trezor/connect-plugin-ethereum, causes runtime errors because @trezor/connect-plugin-ethereum (as of v9.0.5) compiles to CommonJS and does:

const sigUtil = tslib_1.__importStar(require('@metamask/eth-sig-util'));

This crashes in MV3 service workers because the lib no longer provides a CJS build. Steps to Reproduce:

1. Use @trezor/connect-plugin-ethereum in a Manifest V3 extension.
2. Bundle with Webpack or similar.
3. Observe that the background service worker crashes at runtime due to the ESM/CJS mismatch.

Why It Happens:

• @metamask/eth-sig-util v7 is ESM-only.
• tslib.__importStar(require(...)) is effectively a CommonJS import.
• Manifest V3 service workers require the library to be bundled or imported as ESM.

Please provide an ESM-compatible version of @trezor/connect-plugin-ethereum that imports @metamask/eth-sig-util using native ESM. This would probably resolve the MV3 service worker crash 🙏