Adds some helper functions for using concurrency pools.

[michaelfarrell76]

Related Issues

• picked from multi identifier preference record uploads #444
• links https://linear.app/transcend/issue/PIK-166/fix-prferences-cli-to-handle-mutliple-identifiers

These helper functions are picked out of the above PR - these functions will make it possible to run cli commands with maximum concurrency on a machine by using separate processes.

Changes

• Updates code to use node:fs and node:path instead of fs and path
• New helper src/lib/pooling/assignWorkToWorker.ts - this function pulls a job off of a parallel job queue and sends the message to assign the job to the worker
• New helper src/lib/pooling/computePoolSize.ts helps to determine what level of concurrency to use - either whatever is use specified or defaults to number of CPUS
• New helper src/lib/pooling/ensureLogFile.ts will ensure that a log file exists at a file location - useful before appending to the log file
• New helper src/lib/pooling/openTerminal.ts allows for running new commands in a terminal across macos, linux and windows.

[michaelfarrell76]

thanks G @JonnavithulaGirish <3