[process] Stop forcing PTY for queued processes (#171)

[coisa]

Related Issue

Closes #171

Motivation / Context

• Aggregate commands such as reports, standards, and dev-tools:fix enqueue nested DevTools subprocesses.
• ProcessQueue was enabling PTY on every queued process whenever Symfony reported PTY support, which still fails in non-interactive runners without /dev/tty.
• The queue already streams child stdout/stderr through Symfony Process callbacks, including detached processes, so forcing PTY is unnecessary for output forwarding.

Changes

• Removed unconditional setPty(true) from ProcessQueue::add().
• Added regression coverage asserting queued processes are not switched to PTY.
• Documented that nested command output is streamed via process callbacks and aggregate commands should stay non-PTY in CI/non-interactive contexts.
• Added an unreleased changelog entry for the non-interactive aggregate-command fix.

Verification

• composer dev-tools
• Focused command(s):
  • ./vendor/bin/phpunit tests/Process/ProcessQueueTest.php
  • composer dev-tools tests -- --filter='ProcessQueue' --no-cache
  • composer dev-tools tests -- --filter='Process' --no-cache
  • composer dev-tools code-style -- --fix --json
  • composer dev-tools phpdoc -- --json --no-cache
  • composer dev-tools refactor -- --json
  • composer dev-tools changelog:check
  • git diff --check
• Manual verification: reproduced the original reports failure before the fix (proc_open(/dev/tty): Failed to open stream: Device not configured). After removing forced PTY, reports and standards advanced into their nested child commands without the /dev/tty failure; the local run was interrupted once it reached the long phpmetrics stage.

composer dev-tools was not completed end-to-end locally because the full gate enters the long reports -> metrics path in this shell; the original immediate /dev/tty failure is no longer reproduced.

Documentation / Generated Output

• README updated
• docs/ updated
• Generated or synchronized output reviewed

No generated docs/wiki output was committed.

Changelog

• Added a notable CHANGELOG.md entry

Reviewer Notes

• This intentionally removes PTY use instead of adding terminal detection. Symfony Process callbacks already preserve streamed stdout/stderr for blocking and detached processes, which keeps the queue behavior simpler and safer in non-interactive environments.

[github-actions]

🚀 Preview is available for this pull request.

• Docs: https://php-fast-forward.github.io/dev-tools/previews/pr-229/
• Coverage: https://php-fast-forward.github.io/dev-tools/previews/pr-229/coverage/
• Metrics: https://php-fast-forward.github.io/dev-tools/previews/pr-229/metrics/