🐛 extract relevant output from `hatch env show --json`

[valentinoli]

If result.stdout contains something more than the JSON output of all the environments, such as logs from Hatch plugins/hooks, this will result in JSONDecodeError. We must extract the relevant output to prevent such cases.

[juftin]

lol, that was my first time requesting review from co-pilot. It wasn't actually that useful.

Thanks for the contribution, @valentinoli - give me a day or to get a closer look at this but everything looks good on first glance.

[valentinoli]

Perhaps consider parsing hatch.toml/pyproject.toml directly instead

[valentinoli]

@juftin

Consider #96 as an alternative