CLI: Replace inquirer with prompts

[thebuilder]

Issue: #13226

What I did

Replaced all instances of /~https://github.com/SBoudrias/Inquirer.js with /~https://github.com/terkelg/prompts

This is inspired by facebook/create-react-app#10083

They are mostly interchangeable, altho the "separator" option is missing from prompts. It can be emulated by using the "disabled" option, to prevent an item from being selected.

Based on the usage pattern, I opted for a some changes to how the prompts are presented.

bootstrap
This still uses a separator.

test
Splits the choice in to two different questions.

build
Prompts you upfront if this is a watch mode or not, before presenting the list of packages.
Packages can also be selected using autocomplete.

How to test

Run the commands relying on inquirere locally.

[shilman]

Awesome @thebuilder! I'll merge this next week as part of 6.2-alpha. This week I'm doing hotfixes to 6.1.x and freely merging back and forth between master and next. Thanks for your contribution & patience!

[thebuilder]

Are the failing build an issue? 🙂 It's a bit overwhelming trying to understand what causes error, when it happens right after checkout.

[shilman]

@thebuilder our CI is completely borked at the moment. we're working with Circle CI to try to get it back in order. but you should only look at the required checks anyway. So build and test in this case.

[shilman]

@thebuilder Looks like there's a TS error that's breaking CI. Can you fix it?

@storybook/cli: src/initiate.ts(252,11): error TS2322: Type '{ type: "confirm"; name: "manual"; message: string; default: false; }' is not assignable to type 'PromptObject<"manual">'.
@storybook/cli:   Object literal may only specify known properties, and 'default' does not exist in type 'PromptObject<"manual">'.
@storybook/cli: src/initiate.ts(262,9): error TS2322: Type 'string[]' is not assignable to type 'Choice[]'.

6.2's in alpha now so otherwise ready to test & merge.

[thebuilder]

@shilman Sorry about - Not sure how I could miss that. Editor might have been overloaded with types. 🙈
Corrected it, and synced with next branch.

[gaetanmaisse]

@thebuilder it looks like const groups defined in scripts/build-package.js:L56 isn't used anymore, can you remove it?