Add more fine-grained error tracking

[mihaip]

Based on current varzs, 10% of runs encounter an error. Most likely out of bounds accesses (#127, #97), but it would be good to validate.

"emulator_error:other": 4512,
"emulator_error:out_of_memory": 2770,
...
"emulator_starts": 43129,

Could also look into hooking up error reporting to Sentry.

[jllipatz]

Would it be possible to signal the "out of memory" errors the regular way for a Mac,? I mean signaling the error to the Mac OS, not stopping the web application. In that way

• Any other application running on the infinite Mac will be still alive
• It will give the opportunity to track the error within MacOS.

[mihaip]

941b7e9 did this.