feat(@clack/core,@clack/prompts): improve types event emitter & global aliases

[cpreston321]

Resolves: #125 - without changing core default functionality.

In this PR I enhance core types for event emitter while also adding setGlobalAliases. This function while be able to map global aliases for ['up', 'down', 'left', 'right', 'space', 'enter', 'cancel'] default keys. You can also map these keys as a sequence char or the actually char name. Example.

p.setGlobalAliases([
	['w', 'up'],
	['s', 'down'],
	['a', 'left'],
	['d', 'right'],
	['escape', 'cancel'],
	['\x03', 'cancel'], // Crtl+C example from default aliases.
]);

[changeset-bot]

🦋 Changeset detected

Latest commit: 4c535a1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@clack/core	Patch
@clack/prompts	Patch

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[cpreston321]

@Mist3rBru can you take a look at this ?

[orochaa]

@cpreston321 great job! You nailed it.

[natemoo-re]

Sorry it took me far, far too long to review this. It looks great and I really appreciate the contribution!

Adjusting to a minor release and merging in. I am probably going to adjust the setGlobalAliases export to a more generic setEnv() function with an aliases argument before releasing, just FYI.