bundle/brew_services: avoid parsing output of brew services list

[carlocab]

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brew services can output JSON, so let's use that instead since it
should be more reliable.

[Copilot]

Pull request overview

Updates brew bundle’s service detection to use brew services list --json instead of parsing the human-readable table output, aiming for more reliable parsing.

Changes:

• Switch Homebrew::Bundle::Brew::Services.started_services to parse JSON from brew services list --json.
• Update the corresponding RSpec to stub JSON output instead of the table output.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
Library/Homebrew/bundle/brew_services.rb	Changes started_services to use JSON output from brew services list --json.
Library/Homebrew/test/bundle/brew_services_spec.rb	Updates the test fixture output to JSON to match the new implementation.

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[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.

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[MikeMcQuaid]

Much nicer, thanks @carlocab!

Now that bundle and services are both in the same repository we could consider dropping the shelling out entirely and just calling the native Homebrew methods?

[carlocab]

Now that bundle and services are both in the same repository we could consider dropping the shelling out entirely and just calling the native Homebrew methods?

Was considering that, but I wasn't yet sure that we didn't have other reasons for shelling out that still applied. I'll look at it in a follow-up.