UI flags method names suggestions

[sjparkinson]

Consideration for @financial-times/dotcom-ui-flags in the next major version.

We could change the methods to be more domain specific, e.g.

import * as pageKitFlags from '@financial-times/dotcom-ui-flags';

const flagsClient = pageKitFlags.init();

flagsClient.getState('oTracking');

// OR...

flagsClient.isActive('oTracking');

At the moment with the method only being get, that could also mean get the full flag model, rather than only the state.

[i-like-robots]

I'm not sure if this is covered in the code but it really should be... The flags client has been designed to match the existing implementation in n-ui. This is because we have a number of n- components and existing app integrations which expect a .get(flagName) method which returns the current value.