feat: TurboSu initial release - racing telemetry dashboard

dashboards/speedometer/config.json

@@ -0,0 +1,15 @@
+{
+    "id": "speedometer",
+    "name": "极速仪表 - 速度表",
+    "category": "speed",
+    "description": "大字号实时速度显示，支持km/h和mph，适合横屏全屏显示",
+    "author": "Yei.J. (AskaEth)",
+    "version": "1.0.0",
+    "config": {
+        "icon": "🏎️",
+        "unit": "kmh",
+        "show_unit": true,
+        "aspect_ratio": "auto",
+        "render_mode": "contain"
+    }
+}

dashboards/speedometer/template.html

@@ -0,0 +1,7 @@
+<div style="display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;font-family:'Segoe UI',system-ui,sans-serif;background:linear-gradient(135deg,#0a0a14 0%,#1a1a30 100%);">
+    <div style="font-size:120px;font-weight:900;line-height:1;color:#fff;text-shadow:0 0 40px rgba(102,126,234,0.5);" data-bind="speed_kmh">0</div>
+    <div style="font-size:24px;color:rgba(255,255,255,0.6);margin-top:8px;letter-spacing:4px;">KM/H</div>
+    <div style="margin-top:20px;width:300px;height:6px;background:rgba(255,255,255,0.1);border-radius:3px;overflow:hidden;">
+        <div data-bind-speed style="height:100%;background:linear-gradient(90deg,#667eea,#764ba2);border-radius:3px;transition:width 0.1s ease;width:calc(var(--speed,0) / 400 * 100%);"></div>
+    </div>
+</div>