Enable partial cardIcons overrides

[jmorgadosoares]

Why

Providing a partial cardIcons override (e.g. only overriding visa) caused a TypeScript error because the icons prop was typed as the full CardIcons type, making all card brand keys required.

Fixes [EXP-993](https://linear.app/evervault/issue/EXP-993/enable-partial-cardicons-overrides-on-js-and-react-sdks).

How

Changed the icons prop type to Partial<CardIcons> in the three public-facing locations:

• CardOptions in packages/types/uiComponents.ts (JS SDK ui.card config)
• CardComponentOptions in packages/ui-components/src/Card/types.ts
• CardProps in packages/react/lib/ui/Card.tsx (React SDK)

The collectIcons utility in utilities.ts was also updated to accept Partial<CardIcons> and continues to spread the full ICONS defaults first, so any unspecified brands fall back to their defaults. BrandIcon keeps its icons prop typed as the full CardIcons since it is an internal component that only ever receives the already-merged result of collectIcons.

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Latest commit: 567c043

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