init: CryptoCoin desktop ticker

Co-authored-by: Cursor <cursoragent@cursor.com>

src-tauri/settings.json

@@ -0,0 +1,7 @@
+{
+  "enabled": ["BTCUSDT", "ETHUSDT"],
+  "proxyBaseUrl": "https://bn-api-proxy.smyhub.com",
+  "useProxy": true,
+  "refreshIntervalMs": 5000,
+  "backgroundTheme": "dark"
+}