Fix linting issues: configure knip for test files and fix prettier formatting

Co-authored-by: C4illin <20753603+C4illin@users.noreply.github.com>

knip.json

@@ -1,5 +1,6 @@
 {
   "$schema": "https://unpkg.com/knip@5/schema.json",
+  "entry": ["tests/**/*.test.ts"],
   "project": ["src/**/*.ts", "src/**/*.tsx", "tests/**/*.ts"],
   "tailwind": {
     "entry": ["src/main.css"]

package.json

@@ -56,4 +56,4 @@
     "@parcel/watcher",
     "@tailwindcss/oxide"
   ]
-}
+}