chore(utils): migrate block-nameify to TS and add unit tests (#48086)

utils/block-nameify.test.ts

@@ -0,0 +1,23 @@
+import { blockNameify } from './block-nameify';
+
+describe('blockNameify', () => {
+  it('should return a preformatted name when it exists', () => {
+    const result = blockNameify('back-end-development-and-apis');
+    expect(result).toBe('Back End Development and APIs');
+  });
+
+  it('should not format prepositions', () => {
+    const result = blockNameify('and-for-of-the-up-with');
+    expect(result).toBe('and for of the up with');
+  });
+
+  it('should format javascript to JavaScript', () => {
+    const result = blockNameify('javascript');
+    expect(result).toBe('JavaScript');
+  });
+
+  it('should transform "-" to " " and uppercase each word', () => {
+    const result = blockNameify('hello-world');
+    expect(result).toBe('Hello World');
+  });
+});