Introduce testing

package.json

@@ -41,7 +41,7 @@
         }
     },
     "scripts": {
-        "test": "echo \"Error: no test specified\" && exit 1",
+        "test": "vitest",
         "build": "tsup",
         "lint": "eslint -c .eslintrc.json --ext .ts ./src",
         "pub": "yarn build && yarn publish --access public"
@@ -50,15 +50,26 @@
     "author": "",
     "license": "LGPL-3.0",
     "peerDependencies": {
+        "react": "^18.2.0",
         "swr": "^2"
     },
     "devDependencies": {
         "@swc/core": "^1.3.67",
+        "@testing-library/react": "^15.0.2",
+        "@types/eventsource": "^1.1.15",
+        "@types/react": "^18.2.79",
         "@typescript-eslint/parser": "^5.61.0",
+        "@vitest/ui": "^1.5.0",
         "eslint": "^8.44.0",
         "eslint-plugin-v3xlabs": "^1.6.1",
+        "eventsource": "^2.0.2",
+        "happy-dom": "^14.7.1",
+        "jsdom": "^24.0.0",
+        "msw": "^2.2.14",
+        "react": "^18.2.0",
         "swr": "^2",
         "tsup": "^7.1.0",
-        "typescript": "^5.1.6"
+        "typescript": "^5.1.6",
+        "vitest": "^1.5.0"
     }
 }