feat: Add testing sample

Author: HamadTheIronside

.gitignore

@@ -1,2 +1,3 @@
 dist
-node_modules
+node_modules
+index.test.js

index.test.ts

@@ -0,0 +1 @@
+type A = string & number & () => {}

package.json

@@ -1,7 +1,8 @@
 {
   "name": "slots-component",
   "scripts": {
-    "build": "tsc"
+    "build": "tsc",
+    "test": "tsc index.test.ts"
   },
   "devDependencies": {
     "@types/react": "^18.2.73",
@@ -21,4 +22,4 @@
       "release": true
     }
   }
-}
+}

tsconfig.json

@@ -15,6 +15,7 @@
   },
   "exclude": [
     "node_modules",
-    "dist"
+    "dist",
+    "**.test.ts"
   ]
 }