Import rpm.lair.cafe SPA from lair/mistralrs-package/ui @34a28b5

Dedicated repo for the RPM repository web UI, moved out of the
mistralrs-package repo now that multiple package repos publish to
rpm.lair.cafe. Includes an adapted deploy workflow (SPA at repo root).

vite.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react-swc";
+
+export default defineConfig({
+  plugins: [react()],
+  base: "/",
+});