Add an .env input for new components

[raulcanodev]

There are components like this one I created that require a token. It would be great to add the token privately.

Great job!

import ContributionGraph from '@raulcanodev/react-github-dots'

export default function Example() {
  return (
    <ContributionGraph 
      username="githubusername"
      token=process.env.NEXT_PUBLIC_GITHUB_PERSONAL_ACCESS_TOKEN
    />
  )
}