test: add breaking electron-vite esm example

[biw]

Adds a new examples/electron-vite-esm fixture to reproduce the current ESM failure path in an electron-vite app.

This PR:

• adds a minimal Electron + Vite + Vue example with "type": "module"
• initializes Sentry in both the Electron main process and renderer
• loads electron-squirrel-startup via createRequire(import.meta.url) in the ESM main entry
• adds an e2e test that runs with skipEsmAutoTransform: true and asserts the captured fatal event

This example will fail until open-telemetry/opentelemetry-js#6590 is merged in, but I think there's value in adding it here since #1043 and #1007 seem like the same underlying issue. Maybe after open-telemetry/opentelemetry-js#6590 is merged in?

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Semver Impact of This PR

🟢 Patch (bug fixes)

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Internal Changes 🔧

• Add breaking electron-vite esm example by biw in #1354

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[biw]

@timfish maybe I shouldn't have referenced #1007 in my PR 😅