fix(types): allow children on drag resize props

[re-marked]

Summary

• add children to exported DraggableProps and ResizableProps
• keep runtime behavior unchanged; children were already forwarded/rendered
• add type-contract regression tests for both prop types

Closes #63.

Verification

• pnpm test -- packages/renderer/src/components/Draggable.test.tsx packages/renderer/src/components/Resizable.test.tsx
• pnpm --filter @yokai-tui/renderer typecheck
• pnpm --filter @yokai-tui/renderer lint