feat(chart): add @hm-design/chart package with Bar, Line, Donut, Pie, Radar, Area and Radial charts

- new workspace package packages/chart (shadcn/ui Chart + Recharts, HM Theme tokens), examples entry with sample data
- Storybook Chart group (src/chart), consumer example (examples/chart), build:chart / build:chart-example scripts
- README rewritten as the AI usage guide (install, CSS wiring, chart selection, data rules, verification)
- docs: package count/list, Submodule guide (chart workspace, React dedupe), shared AI_GUIDE row, MAINTAINING, story inventory

examples/chart/vite.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from "vite"
+import react from "@vitejs/plugin-react"
+import tailwindcss from "@tailwindcss/vite"
+import { fileURLToPath } from "node:url"
+
+// Consumer example of @hm-design/chart. The fonts come from the repository public folder like the publisher example.
+export default defineConfig({
+  root: fileURLToPath(new URL("./", import.meta.url)),
+  publicDir: fileURLToPath(new URL("../../public", import.meta.url)),
+  base: "./",
+  plugins: [react(), tailwindcss()],
+  server: { host: "127.0.0.1" },
+})