Implement the Chrome DevTools Protocol Profiler domain for node:inspector:
- Profiler.enable/disable - Enable or disable the profiler
- Profiler.start/stop - Start and stop CPU profiling
- Profiler.setSamplingInterval - Configure sampling interval in microseconds
Returns CPU profiles in Chrome DevTools JSON format, compatible with
VS Code, Chrome DevTools, and speedscope.
Also fixes bun:jsc profile() to use pause() instead of shutdown(),
allowing the profiler to be restarted within the same process.
aba74246ed