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

package.json

@@ -26,6 +26,9 @@
     "typecheck": "tsc -b && npm run typecheck --workspaces --if-present",
     "build:ui": "npm run build -w @hm-design/ui",
     "build:center-graphic": "npm run build -w @hm-design/center-graphic",
+    "build:chart": "npm run build -w @hm-design/chart",
+    "build:chart-example": "vite build --config examples/chart/vite.config.ts",
+    "dev:chart-example": "vite --config examples/chart/vite.config.ts",
     "build:org-chart": "npm run build -w @hm-design/org-chart",
     "typecheck:org-chart": "npm run typecheck -w @hm-design/org-chart",
     "test:org-chart": "npm run test -w @hm-design/org-chart",
@@ -39,12 +42,13 @@
     "build:org-chart-react-example": "vite build --config examples/org-chart-react/vite.config.ts",
     "dev:org-chart-react-example": "vite --config examples/org-chart-react/vite.config.ts",
     "test:org-chart-react-browser": "node examples/org-chart-react/verify.mjs",
-    "build:packages": "npm run build:org-chart && npm run build:ui && npm run build:center-graphic && npm run build:org-chart-react && npm run build:sw"
+    "build:packages": "npm run build:org-chart && npm run build:ui && npm run build:center-graphic && npm run build:chart && npm run build:org-chart-react && npm run build:sw"
   },
   "dependencies": {
     "@hm-design/org-chart": "*",
     "@hm-design/org-chart-react": "*",
     "@hm-design/center-graphic": "*",
+    "@hm-design/chart": "*",
     "@hm-design/sw": "*",
     "@hm-design/ui": "*",
     "lucide-react": "^1.49.0",