Plugin System

[3rd-Eden]

This is the draft PR for the plugin system as outlined in #15. The purpose of this draft is to track the progress that we make towards the issue.

Currently Progress:

• [x] Plugin API for our Node.js API/CLI
• [x] Tests for the API/CLI
• [x] Babel transformation.
• [x] Introduction of API methods
• [x] Metro configuration
• [x] Include additional files in the source
• [x] Interception / handling of WebSocket events.
• [x] Execute before, after, test execution. Setup additional hooks, polyfills, anything.
• [x] Intercept error/test failures
• [x] Intercept, and modify test runners. Maybe introduce new config, or call additional API methods.
• [x] Create a { bridge } method that can be used to communicate with the CLI.
• [x] Support a --plugin <name> flag in our CLI/API that will require and initialize our plugins.
• [ ] Extensively document the plugin API, and provide at least 1 working example.
• [ ] The Node and ekke API's are unit tested