feat: Add Crypto Price Ticker Widget

[Zayan-Mohamed]

Description

We need a simple widget that displays the current price of major cryptocurrencies (BTC, ETH, SOL).

Requirements

• Use a free API like CoinGecko (no key required for basic endpoints) or [Binance Public API].
• Display the coin symbol and current price.
• (Optional) Show a small green/red arrow for 24h change.
• It must be toggleable in the Settings menu.

Implementation Guide

1. Create a new file: src/lib/components/widgets/CryptoTicker.svelte
2. Use Svelte 5 $state for data fetching.
3. Add the widget to the grid in src/routes/+page.svelte.

Difficulty: Beginner