"fix command" stderr showing up in `scope doctor run` output

[noizwaves]

#99 improved the UX by eliminating stdout from being output by scope doctor run. I think the same needs to happen for stderr too. Running v2024.2.39 produces this:

❯ scope doctor run --only app --no-cache
==> Updating Homebrew...
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Already up-to-date.
Warning: Formula python-certifi was renamed to certifi.
Warning: Formula python-cryptography was renamed to cryptography.
Using homebrew/bundle
Using homebrew/services
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Using postgresql@14
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Homebrew Bundle complete! 19 Brewfile dependencies now installed.
yarn install v1.22.19
[1/5] Validating package.json...
[2/5] Resolving packages...
success Already up-to-date.
Done in 0.29s.
Deprecation warning: Expected string default value for '--serializer'; got true (boolean).
This will be rejected in the future unless you explicitly pass the options `check_default_type: false` or call `allow_incompatible_default_type!` in your code
You can silence deprecations warning by setting the environment variable THOR_SILENCE_DEPRECATION.
I, [2024-04-05T08:49:02.592365 #99058]  INFO -- ddtrace: [ddtrace] DATADOG CONFIGURATION - PROFILING - {"profiling_enabled":false}
I, [2024-04-05T08:49:02.592762 #99058]  INFO -- ddtrace: [ddtrace] DATADOG CONFIGURATION - CORE - {"date":"2024-04-05T08:49:02-07:00","os_name":"arm64-apple-darwin23","version":"1.18.0","lang":"ruby","lang_version":"3.3.0","env":"development","service":"rails","dd_version":null,"debug":false,"tags":null,"runtime_metrics_enabled":false,"vm":"ruby-3.3.0","health_metrics_enabled":false}
warning: wrong constant name 2yearownoccupation
D, [2024-04-05T08:49:21.065159 #99058] DEBUG -- KafkaRails: [KafkaRails.Callbacks.attach] class: AasmEvent, topic: aasm_event, opts: {:async=>true, :template=>"aasm_events/external", :if=>#<Proc:0x000000030db1a098 /Users/adam.neumann/workspace/hawaiian-ice/packs/integrations/app/models/aasm_event.rb:30 (lambda)>}
Model files unchanged.