switch coverage to codecov

vitest.config.ts

@@ -6,8 +6,9 @@ export default defineConfig({
         globals: true, // <-- reduces test file imports
         reporters: ['verbose'], // <-- verbose output
         coverage: {
-            exclude: [...configDefaults.exclude, 'build/*', 'tests/*'], // <-- exclude JS build
-            reporter: ['text-summary'] // <-- report in text-summary
+            include: ['src/**/*.ts'],
+            reporter: 'lcov',
+            reportsDirectory: './coverage'
         }
     }
 })