feat: add unit test and README

Author: jiangtao.yang

README.MD

@@ -0,0 +1,11 @@
+# Data Structure Visualization
+
+> Limited Structures, Unlimited Algorithms
+
+Demo: https://youngwinds.github.io/data-structure-visualization/
+
+## Develop
+
+```shell
+pnpm install && pnpm dev
+```

package.json

@@ -6,12 +6,16 @@
   "scripts": {
     "dev": "concurrently \"pnpm --filter=./packages/* --parallel dev \" \"pnpm --filter dsv dev\" ",
     "build": "pnpm -r build",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "pnpm --filter=./packages/*  --parallel test",
+    "test:coverage": "pnpm --filter=./packages/*  --parallel test:coverage"
   },
   "keywords": [],
   "author": "",
   "license": "ISC",
   "devDependencies": {
-    "concurrently": "^9.1.0"
+    "concurrently": "^9.1.0",
+    "jest": "^29.0.0",
+    "@types/jest": "^29.0.0",
+    "ts-jest": "^29.0.0"
   }
 }