fix(firebase-auth): throw HTTPException instead of reponse null

[Code-Hex]

I made to throw HTTPException instead of response null 401.

See: #185

Now, we can achieve our own error handling like the below:

app.onError((e, c) => {
  if (e instanceof HTTPException && e.status === 401) {
    return c.json(
      {
        message: 'Custom error message!',
      },
      401
    )
  }
  return c.text('Internal Server Error', 500)
})

[changeset-bot]

🦋 Changeset detected

Latest commit: 80325f4

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

This PR includes changesets to release 1 package

Name	Type
@hono/firebase-auth	Patch

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[yusukebe]

Thanks @Code-Hex !

Let's go with it!