fix: vitest should only check against tests in src folder

Author: AndrewBastin

vitest.config.ts

@@ -0,0 +1,8 @@
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({
+  test: {
+    // Only get files from within the src folder
+    include: ['src/**\/*.{test,spec}.?(c|m)[jt]s?(x)']
+  }
+})