Add customer-segmentation-server example

Demo MCP App for customer data visualization featuring:
- Interactive bubble chart (Chart.js) with configurable X/Y axes
- 250 customers across 4 segments (Enterprise, Mid-Market, SMB, Startup)
- 6 metrics: Revenue, Employees, Account Age, Engagement, Tickets, NPS
- Optional bubble sizing by a third metric
- Clickable legend for segment filtering
- Detail panel on hover/click
- Light/dark theme support

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

examples/customer-segmentation-server/vite.config.ts

@@ -0,0 +1,24 @@
+import { defineConfig } from "vite";
+import { viteSingleFile } from "vite-plugin-singlefile";
+
+const INPUT = process.env.INPUT;
+if (!INPUT) {
+  throw new Error("INPUT environment variable is not set");
+}
+
+const isDevelopment = process.env.NODE_ENV === "development";
+
+export default defineConfig({
+  plugins: [viteSingleFile()],
+  build: {
+    sourcemap: isDevelopment ? "inline" : undefined,
+    cssMinify: !isDevelopment,
+    minify: !isDevelopment,
+
+    rollupOptions: {
+      input: INPUT,
+    },
+    outDir: "dist",
+    emptyOutDir: false,
+  },
+});