Add npm script to display current version

Introduced a new script `version:show` to easily display the current project version from the package.json. This enhances developer efficiency by providing quick access to the version number.

package.json

@@ -9,7 +9,8 @@
     "lint": "eslint --ext .ts .",
     "lint:fix": "eslint --fix --ext .ts .",
     "test:file": "jest --watch --onlyChanged --coverage=true --verbose",
-    "test:verbose": "jest --verbose"
+    "test:verbose": "jest --verbose",
+    "version:show": "node -e \"console.log(require('./package.json').version)\""
   },
   "repository": {
     "type": "git",