chore: add typed ESLint checks #18

Refs WealthLedger/main#18. Keep Biome; add no Prettier dependencies.

src/shared/ui/Button.stories.tsx

@@ -38,7 +38,7 @@ export const Primary: Story = {
 	name: "Основное действие",
 	play: async ({ canvasElement, args }) => {
 		const button = within(canvasElement).getByRole("button", {
-			name: String(args.children),
+			name: typeof args.children === "string" ? args.children : undefined,
 		});
 		button.focus();
 		await expect(button).toHaveFocus();