Add a context method

[KenEucker]

Is your feature request related to a problem? Please describe.

Add a context method that returns a BikeTagClient object with referrer methods for helpful mutations of data that are being used outside of the biketag-api.

Describe the solution you'd like

Add the following interface:

const authorization = 'someauthvalue'
const source = 'imgur'
const opts = {
  game: 'portland',
  source,  
}

const biketag = new BikeTagClient(opts)
const portland =
const {
  game,
  currentBikeTag,
  tags,
  ambassadors,
  profile,
} = biketag.context({ source, authorization })

Describe alternatives you've considered
The community of BikeTag Developers (me, also me. LoL) are already solving for these solutions by using the API and for a single page application, all of these items are needed while multiple requests to the given source might be made for the same resources.

Additional context
See the biketag-vue project's implementation for currentBikeTag and use of authorization values for getting the profile information, for example.

https://github.com/KenEucker/biketag-vue/blob/production/functions/current.ts
https://github.com/KenEucker/biketag-vue/blob/develop/functions/profile.ts