Fix CLI

[willosborne]

Fixes a number of issues accidentally introduced as part of splitting up the project into modules.

• issue with path for loading meta schema
• copyfiles not copying spectral functions on unix
• schema directory name wrong
• error logging insufficient
• cli parse command using wrong name for schemaDirectory arg

This PR highlights that integration tests are urgently needed!

Outstanding issues this PR does not fix:

• build step does not seem to correctly chmod index.js
• github actions can't build the CLI with the new modules - we can't publish

Tests to check:

calm validate -p ../calm/pattern/api-gateway.json -i ../calm/samples/api-gateway-instantiation.json
calm generate -p ../calm/pattern/api-gateway.json -o test.json

[Thels]

This PR highlights that integration tests are urgently needed!

Completely agree, the CLI is a simple module, I'll get on this later today.

[Thels]

Suggestion isn't required - just a minor thing :)