feat(runner): add profile support (local, wsl, docker) and improve watchdog

• Added configuration option "busted-test-explorer.profile" (local|wsl|docker)
• Added settings for custom executables:
  • busted-test-explorer.executable
  • busted-test-explorer.wslExecutable
  • busted-test-explorer.dockerExecutable
• Integrated profile handling in runner.ts (spawn command respects profile)
• Improved idle watchdog: kills hung processes and marks tests as errored
• Enhanced error messages in Test Explorer (diff view, stderr, timeouts)
• Added detailed logging to OutputChannel with emojis 🚀 ✅ ❌ ⏱