feat: offer next steps on the order received page

[YvesCesar]

Suggestion by @henmohr

No checkout/order-received colocar um botão para o usuário acessar o painel de configurações (wordpress) ou fazer sua primeira assinatura (encaminha para o nextcloud).

Related issue: Onboarding do cliente

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Implementation: a next steps section with two actions

[vitormattos]

I believe this should be done differently. If we add a new product, or if the next step isn't this one, this will always remain the next step because it is hardcoded.

[henmohr]

I believe this should be done differently. If we add a new product, or if the next step isn't this one, this will always remain the next step because it is hardcoded.

This could be added to the backlog, since we currently only have one product on offer, but it is a future issue that can be easily resolved. I added a commit in an attempt to fix this.

[vitormattos]

I think the best approach is to use the product note. It’s a default field for a product and it can support rich text. When we translate a product, the note also needs to be translated. Hardcoding the next steps would be a risky workaround.

Follow the suggested field to be used:

If we add this PR as-is to the backlog, we can avoid approving a workaround that would generate a lot of code and extra work for a change that can be solved with a simple fix.

A more simple approach is to define a best place to display the product note.