Exception references with exnref (WebAssembly)

When caught, an exception is reified into an exception reference, a value of the new type exnref.

Browser support

• Chrome ❌
• Chrome Android ❌
• Edge ❌
• Firefox 131 Released on 2024-10-01
• Firefox for Android 131 Released on 2024-10-01
• Safari ❌
• Safari on iOS ❌

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