feat: evaluate features in CLI

[polok]

What's done

For debugging purposes, a new command has been introduced:

 FeaturevisorTestRunner evaluate \
  --environment staging \
  --feature feature_key \
  --feature variable_key \
  --context '{"user_id":"123"}'

Example output:

Evaluating feature e_bar in environment staging...
Against context: ["user_id": FeaturevisorTypes.AttributeValue.string("123")]


###############
 Is enabled?
###############

Value: true

Details:

- bucketKey: e_bar
- bucketValue: 1000
- enabled: true
- reason: rule
- ruleKey: 1


###############
 Variation
###############

Value: control

Details:

- variation: control
- bucketKey: e_bar
- bucketValue: 1000
- reason: allocated
- ruleKey: 1


###############
 Variable: color
###############

Value: string("red")

Details:

- variableType: string
- defaultValue: string("red")
- bucketKey: e_bar
- bucketValue: 1000
- reason: defaulted
- variableValue: string("red")


###############
 Variable: hero
###############

Value: object(["alignment": FeaturevisorTypes.VariableValue.string("center for B"), "subtitle": FeaturevisorTypes.VariableValue.string("Hero Subtitle for B"), "title": FeaturevisorTypes.VariableValue.string("Hero Title for B")])

Details:

- variableType: object
- defaultValue: object(["alignment": FeaturevisorTypes.VariableValue.string("center"), "subtitle": FeaturevisorTypes.VariableValue.string("Hero Subtitle"), "title": FeaturevisorTypes.VariableValue.string("Hero Title")])
- bucketKey: e_bar
- bucketValue: 1000
- reason: allocated
- ruleKey: 1
- variableValue: object(["alignment": FeaturevisorTypes.VariableValue.string("center for B"), "subtitle": FeaturevisorTypes.VariableValue.string("Hero Subtitle for B"), "title": FeaturevisorTypes.VariableValue.string("Hero Title for B")])

As a reference featurevisor/featurevisor#295

[fahad19]

do we need this line?

[polok]

Nooooo, it's a copy & paste the issue. Removed