fix: surface exception when failing to resolve package entry

[benmccann]

Description

resolveExports throws an exception when trying to SSR Firebase. This method had a Failed to resolve entry for package error message, but it wouldn't get triggered if there's an exception

Additional context

Firebase has long been the #1 library that people complain about using with SvelteKit. I finally got tired of people complaining about it and decided to dig into it. It turns out that there was an exception being thrown and swallowed. This will allow some details to be printed to the console to reveal what the issue is (#4425)

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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