Improve `std` and `stdout` handling

[crutchcorn]

Currently, there's a number of issues with how we're handling stderr and stdout.

1. If nothing is passed to stdout, it will hang eternally
2. stderr contents are inaccessible via queries

To solve this, let's implement the following:

• Add *ByErrorMessage queries
  • Add in _stderr internally, like _stdout
• Remove stdstr entirely
• Remove toThrow behavior when stderr is ran at first

[github-actions]

🎉 This issue has been resolved in version 1.0.0-alpha.13 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

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