option to fail if config not exists

[genu]

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Environment

Node v22.5.1

Reproduction

    const { config } = await loadConfig({ configFile: 'THIS_FILE_DOESNT_EXIST.ts' })

    console.log('loaded config: ', config)

Describe the bug

When loading a config, there isn't a way, as far as I can tell to know whether the config file was loaded or not:

The config file doesn't exist, nor does loadConfig raise an error about it. I would think that there should be a guarantee that the config was loaded after calling loadConfig or indicate that the config file failed to load.

Additional context

No response

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