Describe the capture flow

[samdark]

Issue Category

Process docs

Description

Need to describe what is the capture intents flow and why these are line that and what happens on the payment processor side at each stage. Need to use examples. Basically, the following but with interface methods:

1. CREATE - create an intent, display pament for to end user
2. CONFIRM - user entered card data
3. AUTHORIZE - HOLD (usually done by gateway in 2)
4. CAPTURE - final transaction

The business case are: 1) Book a hotel (HOLD) → actual coming there (CAPTURE) 2) Order a pizza (HOLD) → delivery done (CAPTURE)