Add Vitest coverage dependency to package.json and package-lock.json

Author: StoppedwummSites

package-lock.json

@@ -19,6 +19,7 @@
     "uuid": "^11.1.0"
   },
   "devDependencies": {
+    "@vitest/coverage-v8": "^3.1.3",
     "electron": "^36.1.0",
     "electron-builder": "^26.0.12",
     "vitest": "^3.1.3"