add basic CI tests and linting

[fmigneault]

Changes

• Refactor canarieapi.test into canarieapi.schema and rename test_config to validate_config_schema
  to better represent their intended use.
• Add multiple linting validations with Makefile targets.
• Add minimal tests with GitHub Actions CI integration.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@0a25a87). Click here to learn what that means.
Patch has no changes to coverable lines.

❗ Current head 446c55c differs from pull request most recent head 4963265. Consider uploading reports for the commit 4963265 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #11   +/-   ##
=========================================
  Coverage          ?   75.86%           
=========================================
  Files             ?       11           
  Lines             ?      522           
  Branches          ?       81           
=========================================
  Hits              ?      396           
  Misses            ?       96           
  Partials          ?       30           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.