feat(footer): add Odoo Freelancer Directory to Useful Links; drop the directory page's bottom Start CTA

- 13 tracked pages + the directory page's footer carry a new <li>
  <a href="/odoo-community-developers/">Odoo Freelancer Directory</a>,
  placed after "ODOO Hosting in 2027" (our service links together, before Support/Legal).
- The directory page itself is excluded (a page does not link to itself in its own footer).
- Removed the final Start / "Browse the freelancers" CTA section from the directory page;
  the hero copy keeps its one "Browse the freelancers" link. .cmp-cta CSS untouched (11 pages).

odoo-community-developers/index.html

@@ -1769,16 +1769,6 @@
       </div>
     </div>
 
-    <!-- Final CTA -->
-    <section class="section-dark cmp-cta" id="start">
-      <div class="container">
-        <h2 class="section-title">Start</h2>
-        <div class="cmp-cta-actions">
-          <a href="#directory" class="btn btn-brass btn-lg">Browse the freelancers</a>
-        </div>
-      </div>
-    </section>
-
     </main>
 
     <!-- Footer (copied from a currently live selling page; no link to this page is added anywhere) -->