Enhance extra_cards

[ajagnanan]

Is your feature request related to a problem? Please describe.
I'd like the ability to add extra_cards before and after the generated cards

Describe the solution you'd like
Enhance the extra_cards option to be extra_cards_before and extra_cards_after which places custom cards before and after the generated cards

Describe alternatives you've considered
Currently there isn't a way to place cards after

Additional context
Discussion topic: #59

[DigiLive]

Note: The Home view has the same, but it's called quick_access_cards and extra_cards.

mushroom-strategy/src/views/HomeView.js

Lines 78 to 92 in e6cefd0

	// Add quick access cards.
	if (options.quick_access_cards) {
	homeViewCards.push(...options.quick_access_cards);
	}
	// Add area cards.
	homeViewCards.push({
	type: "vertical-stack",
	cards: areaCards,
	});
	// Add custom cards.
	if (options.extra_cards) {
	homeViewCards.push(...options.extra_cards);
	}