Enable payment processors ( Mollie, paypal and stripe)

[NicoJuicy]

Enable a payment/donation option for tags and items ( currently use Mollie, later Paypal and Stripe).

The payment methods are on a site basis

Possibilities:

• [ ] Posts can be set on subscriber content, so the content is restricted
• [ ] Tags can be set on subscriber content, so the content is restricted
• [ ] Donations can be requested to make unique content per post There should be discussion about what content can be added --> Work with goals or something like kickstarter?
• [ ] A site can be restricted? ( don't do this currently)

[NicoJuicy]

Currently 4 optional subscriptions. Discussion is restricted ( when the tag is added), but currently this is the status: TODO:

• Setup link interrupter ( go to paywall instead of to the link), it is OK with own content
• Discussion is restricted ( = go to own content)
• Subscriptions are added ( layout), the post is setup. But the payment processor is not integrated yet
• Mollie Payment hook is setup, received an ACK for a PAID order --> saved in database. Only for ONE TIME payments ( no recurring payments yet)

[NicoJuicy]

Mollie added, no complete setup required for now