Provide/Inject-pattern for store

[gfoidl]

So far the state was

• "shared global"
• local only -- i.e. for each "use" a new state

With this change the state is encapsulated in a create...Store-function, so a fresh state can be obtained (e.g. for testing). With the provide...Store / use...Store functions a shared state can be managed. A parent component can provide the (shared) state, children can then inject this state.

For the testing the store itself, fresh states can be used, and dependency-injection is possible.

Summarizing, I prefer this provide/inject-pattern over the plain shared state pattern.