feat(run-tests-zkasm.js): use yargs to build CLI

[mooori]

Uses yargs to handle command line arguments and build a CLI. No changes in behavior.

It is now possible to show docs with node ./run-tests-zkasm.js --help which prints:

run-tests-zkasm.js <path> [outfile]

the default command runs zkASM tests

Positionals:
  path     The zkASM file to run or a directory to search for zkASM files.
                                                                        [string]
  outfile  If provided, results are written to this file. Otherwise they are
           printed to stdout.                                           [string]

Options:
  --help     Show help                                                 [boolean]
  --version  Show version number                                       [boolean]

Motivation

• Make usage of the script easier, for example when running it manually during development.
• Facilitate handling of command line options that will be required for benchmarking.
  • Without a library like yargs handling options in addition to multiple positional arguments would become messy.