feat: enforce catch-all rule in features with configuration

[fahad19]

Background

Featurevisor lets you define rules in features against individual environments: https://featurevisor.com/docs/features/#rules

Currently, there's no strict requirement to have a catch-all rule (matching everyone) as the last rule inside individual environments:

# features/my_feature.yml

# ...

environments:
  production:
    - key: nl
      segments: netherlands
      percentage: 100

    # this is optional in Featurevisor
    - key: everyone
      segments: "*" # catch-all
      percentage: 0

What's done

A new project configuration has been introduced:

// featurevisor.config.js
module.exports = {
  // ...

  enforceCatchAllRule: true, // false by default
};

If set to true, linting will fail if there are any features found that do not have a catch-all rule in any environment:

$ npx featurevisor lint