feat: add `TransactionFilters` component for filtering history by type and asset

[rayeberechi]

Summary

TransactionHistory renders a flat list with no filtering. A companion TransactionFilters component should provide controlled filter state that consumers can wire up.

Implementation Steps

1. Create src/components/transaction/TransactionFilters.tsx.
2. Props:
   • types: TransactionRecord['type'][] — available type options.
   • assets: string[] — available asset codes.
   • value: { types: TransactionRecord['type'][]; asset: string | null } — controlled value.
   • onChange: (filters: typeof value) => void.
   • className?: string.
3. Render a group of toggle buttons for types and a <select> for asset. Use Radix UI ToggleGroup for the type buttons.
4. All interactive elements must have visible labels and keyboard support.
5. Export from src/index.ts.
6. Export the TransactionFilters value type as TransactionFilterState from src/types/index.ts.
7. Write tests: toggling a type calls onChange with updated array; selecting an asset calls onChange.

Definition of Done

• Fully controlled component (no internal state).
• Radix UI ToggleGroup used for type filters.
• TransactionFilterState type exported.
• Keyboard accessible.
• Tests pass.