List provider connections

curl -X GET "https://api.live.paisr.tech/v2/providers" \
  -H "Authorization: Bearer <access_token>" \
  -H "User-Agent: MyApp/1.0" \
  -H "Content-Type: application/json"

{
  "success": true,
  "data": {
    "providers": [
      {
        "id": "bpc_123456",
        "name": "Paisr Pay",
        "summary": "A payment provider that supports multiple payment methods.",
        "description": "A payment provider that supports multiple payment methods.",
        "logo": "https://wallet.paisr.tech/logo.png",
        "method": "card",
        "slug": "pcb",
        "available": true,
        "external": false,
        "config": {
          "type": "managed",
          "status": "active",
          "fee_strategy": {
            "type": "custom",
            "interchange": {
              "fee_type": "...",
              "fee_total": "...",
              "fee_cap": "..."
            }
          },
          "metadata": {}
        },
        "attributes": {
          "min_amount": 0.01,
          "max_amount": 100000,
          "allows_recurring": true,
          "allows_refunds": true,
          "allows_disputes": true,
          "confirmation_window": "immediately",
          "supported_currencies": [
            "string"
          ]
        },
        "created_at": "2024-01-15T10:30:00Z"
      }
    ]
  }
}