feat(inquirer): export types Question, DistinctQuestion and Answers

[mshima]

Related to #1527.

[codecov]

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[SBoudrias]

Implemented a few basic changes:

1. Rename types to Question/DistinctQuestion to match those in @type/inquirer.
2. Remove test examples of PromptSession - I updated the test with [] const satisfies Question[] which achieve the same thing without needing to know about another type. I kept the export as I assumed you'll need it for Yeoman.

[email protected] includes this.