feat: `migrate` allow passing path or component

[manuel3108]

Relates https://github.com/sveltejs/cli/issues/278

Obviously only merge once the issue above is implemented.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: e31835fd4c13e762253e1fd3cf7a3e52039cc581

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[pkg-pr-new[bot]]

Open in Stackblitz

pnpm add https://pkg.pr.new/sveltejs/cli/sv@273

commit: e31835f

[paoloricciuti]

Obviously only merge once the issue above is implemented.

You can't tell me what to do [merge]

😄 😄 😄