Vanilla

[rockwellll]

This PR introduces another file that can be imported in environments where the document and window are not set. For example, the default import which also includes Stimulus and initializes it is still like this,

import Hellotext from '@hellotext/hellotext`

While if someone wants to exclude Stimulus from starting, they can import the vanilla that only initializes Hellotext.js via

import Hellotext from '@hellotext/hellotext/vanilla`

Session Assignments

This PR allows developers to set the value of the session when initializing the library. Maybe the session was retrieved from another system and the developers wants to reuse that. If that's the case, it's possible to add it as a config parameter.

Hellotext.initialize(':id', {
  session: <some-session>
})

When the value is present Hellotext uses that without dispatching session-set events, otherwise it creates a new one.

Conditional Document accesses

The Cookie class always assumed the presence of the document object, which would have raised issues in non-browser environments, i.e running in a Node.js environment. For this reason, the Cookie class only attempts to set or get values from the document's cookie when the object is defined.