feat: Support `-y` in `astro add`

[mayank99]

Changes

Just checks flags.y in addition to flags.yes.

Testing

I didn't see any tests.

Docs

QoL change. Not sure if it needs to be documented.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 2139d454f318e766d787d76969fff99af6991181

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

This PR includes changesets to release 12 packages

Name	Type
astro	Patch
@e2e/astro-component	Patch
@e2e/error-react-spectrum	Patch
@e2e/error-sass	Patch
@e2e/errors	Patch
@e2e/lit-component	Patch
@e2e/preact-component	Patch
@e2e/react-component	Patch
@e2e/solid-component	Patch
@e2e/svelte-component	Patch
@e2e/e2e-tailwindcss	Patch
@e2e/ts-resolution	Patch

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[FredKSchott]

LGTM! Love quick changes like this 👍