6 - offer templates

[mhak]

Description / Motivation

Partially implements #6.

Created offer service and offer command to retrieve all offer templates or offer templates by Id. Create and update is blocked as the API does not allow updates with a public token.

Added tabSize onto settings.json for better consistency amongst developers

How Has This Been Tested?

tested locally by running both commands

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation update (non-breaking change; modified files are limited to the /docs directory or other markdown files)

Checklist:

• [x] I have read the Contributing guide.
• [x] My code/comments/docs fully adhere to the Code of Conduct.
• [x] My change is a code change.
• [ ] My change is a documentation change and there are NO other updates required.

[dylanyoung-dev]

Looks good, but says the PR is in draft so I can't merge until it's ready to be merged.