fix: SSR-compatible random ID generation (avoid window.crypto)

[Copilot]

EzyTables constructor used window.crypto.getRandomValues(...) to generate dynamic CSS class suffixes, causing ReferenceError: window is not defined in Node.js/SSR environments (Next.js, Nuxt, etc.).

Change

• src/index.ts: Replace window.crypto with globalThis.crypto (optional-chained) and fall back to Math.random() when the Web Crypto API is unavailable.

// Before
const randomId = window.crypto.getRandomValues(new Uint32Array(1))[0];

// After
const randomId =
  globalThis.crypto?.getRandomValues(new Uint32Array(1))?.[0] ??
  Math.floor(Math.random() * 0xffffffff);

globalThis.crypto is available natively in browsers and Node ≥ 19; the Math.random() fallback covers older runtimes that lack the Web Crypto API.