feat(connector): add payouts integration for AdyenPlatform

[kashif-m]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Closes #4873

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

New payout connector for processing bank transfers across the globe

How did you test it?

Tested locally using SEPA bank transfers.

• Create and fulfill a regular payout

--header 'Content-Type: application/json' \
--header 'api-key: dev_XhH91FQTTImKOhMZRLkDoFDtRdonZXh6OiVc86ytl2uQ9GypNeBVThSLhGLFA0xY' \
--data-raw '{
    "amount": 100,
    "currency": "EUR",
    "customer_id": "cus_VBGzaXfSY4EWNedRITF0",
    "email": "[email protected]",
    "name": "John Doe",
    "phone": "999999999",
    "phone_country_code": "+65",
    "description": "Its my first payout request",
    "payout_type": "bank",
    "priority": "regular",
    "payout_method_data": {
        "bank": {
            "iban": "NL57INGB4654188101"
        }
    },
    "connector": [
        "adyenplatform"
    ],
    "billing": {
        "address": {
            "line1": "Raadhuisplein",
            "line2": "92",
            "city": "Hoogeveen",
            "state": "FL",
            "zip": "7901 BW",
            "country": "NL",
            "first_name": "John",
            "last_name": "Doe"
        },
        "phone": {
            "number": "0650242319",
            "country_code": "+31"
        }
    },
    "entity_type": "Individual",
    "recurring": true,
    "metadata": {
        "ref": "123"
    },
    "confirm": true,
    "auto_fulfill": false
}'

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible