fix(playgrounds): handle out of memory playground worker VSCODE-269

[Anemy]

VSCODE-269

This pr makes it so that when the playground worker running mongosh runs out of memory we re-initialize the language server so that subsequent playgrounds can be run.
The pr adds a playground to the repository to be used for testing this functionality.

At first I was trying to catch an error the worker thread would throw but it seemed to happen at a higher level

vscode/src/language/mongoDBService.ts

Line 151 in 36cebd0

const worker = new WorkerThreads(

I'm thinking the VSCode language server disposes any language servers that encounter an out of memory error and restarts them automatically. It throws a Pending response rejected since connection got disposed error which is what we look for.