feat: format options for infusing

[antfu]

This PR introduces a new parameter for infusing. Allowing passing format options to the infuser.

The option type:

export type FormatOptions = {
  intend?: number, // default: 2
  eof?: string // default: "\n"
}

---

Currently the infuser will output like this

<i18n locale="en" lang="json5">
{
  id: 'User ID',
  password: 'Password'
}</i18n>

In this PR, the output will be: (by passing eof option, you would able to use Windows CRLF eol or disable eof totally)

<i18n locale="en" lang="json5">
{
  id: 'User ID',
  password: 'Password'
}
</i18n>

[kazupon]

Thanks a lot!
LGTM! 👍