feat: brownfield config file

[Esemesek]

Summary

Fixes #62

• Added support for configurations files and configuration key in package.json
• Generated schema.json file (from TS type definition) to support IDE suggestions in JSON files
• Added UTs

Test plan

1. Add a configuration file in project that uses brownfield cli
2. Run brownfield cli command and observe injected options from the configuration
3. Run brownfield cli command and and pass additional CLI arguments and observe that arguments override the configuration keys