Better error handling and documentation around `query_packwerk console`

[technicalpickles]

I noticed this while trying a few variations of the command to get help usage:

❯ query_packwerk console --help
Loading packwerk context in --help...
/Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/query_packwerk-0.1.0/lib/query_packwerk/console.rb:16:in 'Dir.chdir': No such file or directory @ dir_chdir0 - --help (Errno::ENOENT)
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/query_packwerk-0.1.0/lib/query_packwerk/console.rb:16:in 'QueryPackwerk::Console.start'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/sorbet-runtime-0.5.11987/lib/types/private/methods/call_validation.rb:282:in 'UnboundMethod#bind_call'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/sorbet-runtime-0.5.11987/lib/types/private/methods/call_validation.rb:282:in 'T::Private::Methods::CallValidation.validate_call'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/sorbet-runtime-0.5.11987/lib/types/private/methods/_methods.rb:277:in 'block in QueryPackwerk::Console._on_method_added'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/query_packwerk-0.1.0/lib/query_packwerk/cli.rb:16:in 'QueryPackwerk::CLI#console'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/sorbet-runtime-0.5.11987/lib/types/private/methods/call_validation.rb:282:in 'UnboundMethod#bind_call'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/sorbet-runtime-0.5.11987/lib/types/private/methods/call_validation.rb:282:in 'T::Private::Methods::CallValidation.validate_call'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/sorbet-runtime-0.5.11987/lib/types/private/methods/_methods.rb:277:in 'block in QueryPackwerk::CLI#_on_method_added'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/thor-1.3.2/lib/thor/command.rb:28:in 'Thor::Command#run'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/thor-1.3.2/lib/thor/invocation.rb:127:in 'Thor::Invocation#invoke_command'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/thor-1.3.2/lib/thor.rb:538:in 'Thor.dispatch'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/thor-1.3.2/lib/thor/base.rb:584:in 'Thor::Base::ClassMethods#start'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/lib/ruby/gems/3.4.0/gems/query_packwerk-0.1.0/exe/query_packwerk:7:in '<top (required)>'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/bin/query_packwerk:25:in 'Kernel#load'
        from /Users/josh.nichols/.local/share/mise/installs/ruby/3.4.2/bin/query_packwerk:25:in '<main>'

query_packwerk/lib/query_packwerk/cli.rb

Lines 15 to 16 in 8b61933

	sig { params(directory: String).void }
	def console(directory = Dir.pwd)

❯ query_packwerk help console
Usage:
  query_packwerk console

Query packwerk in the current directory via console

I think this could benefit from a few improvements:

• make sure --help is supported everywhere with a class_option
• update desc call to include DIRECTORY, ie desc 'console DIRECTORY'
• make sure the description matches the behavior (ie don't say 'current directory' if it can be passed in)
• error check that directory exists, and give an appropriate error