[WIP] Add CLI Support

[arggrande]

• Add yargs for CLI parsing
• Identify the functions that need to be exported/imported from the main codebase
  • Firewall.prototype.exec
  • getServersFile
  • loadMainFiles
    • Potentially replace this with a bundler
  • PingWrapper.prototype._updateClusterStatus
• Create the CLI commands needed for this to work and identify basic usage commands
  • csgo-mm-picker - basic usage command, to be registered on the PATH for global execution
  • reset - Resets all CSGO rules from the relevant firewall
  • list - lists all the servers and relevant pings
  • set - sets a given server to the 'chosen' server
  • ping will ping a given region/cluster
  • Double check cross-platform support
    • Windows
    • MacOS
    • Linux
• Add a new entry point for the app, called cli-main.js
  • Check how the current installation works for packaging (the docs have the dist command)
  • Add a new package call/script for the packaging of the cli.exe
    • How do we add to the PATH variables?
  • Look at registering a new package on NPM, called csgo-mm-picker-cli
• Docs
  • CLI functions should all have good self-documentation
• Update the README with the example usages

[arggrande]

I may do a bit of refactoring on some of some of those functions that handle the cluster/firewall/ping processing to remove the dependency on the electron stuff, so we can use it in the CLI, otherwise I'd have to re-write the functions from scratch, which seems like a waste :)

[arggrande]

I've still got quite a bit of work to do on this, but I'm happy to address any feedback you may have as I go along! ^_^

[arggrande]

Just to give an update: I'm still working on this, however I've been a bit stretched for time (and energy lol), so I'll be setting aside some time this weekend to continue working on it :)