Feat/windows install report bundle

[fullstackdev0110]

Added a new Windows support-report workflow so users can generate a structured diagnostics bundle with one command.

• Adds .\dream.ps1 report to generate a Windows diagnostics bundle.
• Creates:
  • artifacts/windows-report/report.json (full machine/compose/health payload)
  • artifacts/windows-report/report.txt (human-readable summary)
• Captures key triage data in one place:
  • OS/RAM/GPU/backend basics
  • compose flags
  • docker version, docker info
  • docker compose config, docker compose ps -a
  • local health checks (LLM API, WebUI, dashboard, dashboard API)
• Updates Windows troubleshooting docs with how to run and share the report.
• Adds CI test coverage for command wiring (test-windows-report-command.sh) and runs it in test-linux.yml.

[Lightheartdevs]

PR #719 just merged and touches the same lint-powershell.yml file. Please rebase onto main to pick up that change and drop the duplicate hunk. The rest of this PR is approved — merge once rebased.

[fullstackdev0110]

Rebased onto main and force-pushed. The duplicate hunk in lint-powershell.yml has been removed. Ready for merge.