Some code cleanup, add jest coverage and begin using it for utility functions

resources/scripts/lib/strings.spec.ts

@@ -0,0 +1,14 @@
+import { capitalize } from '@/lib/strings';
+
+describe('@/lib/strings.ts', function () {
+    describe('capitalize()', function () {
+        it('should capitalize a string', function () {
+            expect(capitalize('foo bar')).toBe('Foo bar');
+            expect(capitalize('FOOBAR')).toBe('Foobar');
+        });
+
+        it('should handle empty strings', function () {
+            expect(capitalize('')).toBe('');
+        });
+    });
+});