feat: initial Racecraft web client v0.1.0

Vue 3 + TypeScript + Vite web client for rusty-telemetry.

- Dashboard with system status, live feeds, quick actions
- Live telemetry view with real-time gauges (speed/RPM/gear)
- Session management (create, run, complete, analyze)
- Shift point analysis with Chart.js visualizations
- Track map with Canvas 2D boundary rendering
- Typed API client for all 19 REST endpoints
- Dark theme, network-accessible via Vite 0.0.0.0 bind

env.d.ts

@@ -0,0 +1,6 @@
+/// <reference types="vite/client" />
+declare module '*.vue' {
+  import type { DefineComponent } from 'vue'
+  const component: DefineComponent<Record<string, unknown>, Record<string, unknown>, unknown>
+  export default component
+}