fix(cli): stop duplicating SwiftPM output during tuist install

What

tuist install (and any other path through SwiftPackageManagerController.resolve/update with printOutput: true) prints every SwiftPM line twice — every Computing version for ..., Fetching ..., Computed ... at X.Y (Zs), and any warnings, all duplicated end-to-end. SwiftPM funnels nearly all of its output (progress + warnings + errors) to stderr, which is the stream that hits the duplicate write path.

Root cause

The CLI command-execution refactor in #10628 swapped System.runAndPrint for CommandRunner + a runAndPrint extension on CommandRunning. In that refactor, SwiftPackageManagerController became the only call site in the repo that constructs CommandRunner with a logger:

commandRunner: { CommandRunner(logger: Logger.current) }

For every stderr chunk, CommandRunner does two things in the same loop (Command 0.14.4, Sources/Command/CommandRunner.swift:181-184):

1. continuation.yield(.standardError(bytes)) — consumed by runAndPrint (CommandRunning+TuistSupport.swift:42), which writes the bytes to FileHandle.standardError.
2. logger?.error("\(output)") — Logger.current resolves to StandardLogHandler (default .info threshold, so .error passes), which writes the same string to FileHandle.standardError again, colored red.

Result: every SwiftPM line shows up twice — once plain, then again in red.

Fix

Drop the logger from this one factory. This brings SwiftPackageManagerController in line with the ~30 other CommandRunner() instantiations across the CLI, all of which already use the no-logger default. CommandRunner still bundles the collected stderr into the thrown CommandError on non-zero exit, so failure visibility is preserved.

Reproduction

In examples/xcode/generated_app_with_airship_sdk:

tuist clean dependencies
tuist install 2>install.stderr.log 1>install.stdout.log
sort install.stderr.log | uniq -c | sort -rn | head

Pre-fix output (every line printed exactly twice):

21 stderr lines, 7 unique SwiftPM messages each duplicated 2x:
      2 [1/847312] Fetching ios-library
      2 Working copy of https://github.com/urbanairship/ios-library.git resolved at 18.9.2
      2 Fetching https://github.com/urbanairship/ios-library.git
      2 Fetched https://github.com/urbanairship/ios-library.git from cache (29.91s)
      2 Creating working copy for https://github.com/urbanairship/ios-library.git
      2 Computing version for https://github.com/urbanairship/ios-library.git
      2 Computed https://github.com/urbanairship/ios-library.git at 18.9.2 (30.42s)

Post-fix: each unique message appears with count 1 instead of 2.

Test plan

• tuist install against a project that resolves several SwiftPM dependencies — confirm each Computing version / Computed / Fetching / Fetched line and any warnings print exactly once.
• Force a SwiftPM resolve failure (e.g. a bad URL in Package.swift) — confirm the error still surfaces to the user.