Adding vitest for testing

Currently implemented

- FormatBytes
- MathHelpers

package.json

@@ -3,7 +3,7 @@
 	"version": "1.0.0",
 	"main": "",
 	"scripts": {
-		"test": "echo \"Error: no test specified\" && exit 1",
+		"test": "node test test/Test*.js",
 		"utils-min-build": "node_modules/esbuild/bin/esbuild utils.min=src/utils.mjs --outdir=build/js/output/ --format=esm --bundle --charset=utf8 --tree-shaking=false --minify-whitespace --minify-syntax --sourcemap",
 		"utils-build": "node_modules/esbuild/bin/esbuild utils=src/utils.mjs --outdir=build/js/output/ --format=esm --bundle --charset=utf8 --tree-shaking=false",
 		"utils-build-all": "npm run utils-min-build && npm run utils-build",
@@ -17,6 +17,7 @@
 		"@types/jquery": "^3.5.32",
 		"esbuild": "^0.25.0",
 		"eslint": "^9.20.1",
-		"globals": "^15.15.0"
+		"globals": "^15.15.0",
+		"vitest": "^3.0.8"
 	}
 }