Add vitest

package.json

@@ -12,18 +12,24 @@
 		"format": "prettier --write --cache --plugin-search-dir=. .",
 		"pre-commit": "lint-staged",
 		"postinstall": "husky install; cypress cache prune",
-		"test": "cypress run",
+		"test:unit": "vitest",
+		"test:coverage": "vitest run --coverage",
+		"test:browser": "cypress run",
+		"test": "test:unit && test:browser",
 		"cy": "cypress open"
 	},
 	"devDependencies": {
 		"@cypress/snapshot": "^2.1.7",
 		"@sveltejs/adapter-static": "1.0.0-next.34",
 		"@sveltejs/kit": "1.0.0-next.359",
+		"@testing-library/jest-dom": "^5.16.4",
+		"@testing-library/svelte": "^3.1.3",
 		"@types/mermaid": "^8.2.9",
 		"@types/pako": "^1.0.3",
 		"@typescript-eslint/eslint-plugin": "^4.33.0",
 		"@typescript-eslint/parser": "^4.33.0",
 		"autoprefixer": "^10.4.7",
+		"c8": "^7.11.3",
 		"chai": "^4.3.6",
 		"cssnano": "^5.1.12",
 		"cy-verify-downloads": "^0.1.8",
@@ -38,8 +44,10 @@
 		"eslint-plugin-svelte3": "^3.4.1",
 		"eslint-plugin-tailwindcss": "^3.6.0",
 		"husky": "^8.0.1",
+		"jsdom": "^20.0.0",
 		"lint-staged": "13.0.3",
 		"mocha": "^10.0.0",
+		"msw": "^0.43.0",
 		"node-html-parser": "^5.3.3",
 		"postcss": "^8.4.14",
 		"postcss-load-config": "^4.0.1",
@@ -50,7 +58,8 @@
 		"tailwindcss": "^3.1.4",
 		"tslib": "^2.4.0",
 		"typescript": "^4.7.4",
-		"vite": "^2.9.13"
+		"vite": "^2.9.13",
+		"vitest": "^0.17.0"
 	},
 	"dependencies": {
 		"@analytics/google-analytics": "^0.5.3",