[FEATURE] Support rendering inline errors in MethodCard

[freemer]

Feature request summary

Currently duplicate title errors can only be rendered in a banner, as MethodCard has no inline error rendering capability - a potential solution would be to add an errors prop to the component.

Rationale

Without this feature, apps are unable to follow the app design alert guidelines.

Also

Where is the best place to report bugs? The discountAutomaticAppUpdate mutation currently returns doubles of the title must be unique error :D

{
    "data": {
        "discountAutomaticAppUpdate": {
            "userErrors": [
                {
                    "field": [
                        "automaticAppDiscount",
                        "title"
                    ],
                    "message": "must be unique",
                    "__typename": "DiscountUserError"
                },
                {
                    "field": [
                        "automaticAppDiscount",
                        "title"
                    ],
                    "message": "must be unique",
                    "__typename": "DiscountUserError"
                }
            ],
            "__typename": "DiscountAutomaticAppUpdatePayload"
        }
    },
   ...
}