docs: refresh readme status + dashboard screenshots

- Project status -> Phase 27 done, Phase 28 (Android app) in progress
- Added Android companion app to feature list
- Regenerated pics/ui.png (mobile 390px + desktop 1280px dashboards)

templates/base.html

@@ -96,10 +96,6 @@
 
         <footer class="bg-white border-top text-center py-3 small text-muted d-none d-md-block">
             &copy; vroom vroom yaris de course 2023
-            <span class="mx-1">·</span>
-            <a href="https://github.com/quoije/yaris-obd" class="text-muted text-decoration-none" target="_blank" rel="noopener" title="GitHub repository">
-                <i class="fab fa-github fa-fw"></i> GitHub
-            </a>
         </footer>
     </div>