fix: add squad logo to docs site (was gitignored)

The root .gitignore had 'images/' which matched docs/public/images/ too broadly.
Changed to '/images/' to only ignore the root images directory.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: bradygaster

.gitignore

@@ -18,5 +18,5 @@ docs/dist/
 .squad-workstream
 .squad/.first-run
 
-# Images folder
-images/
+# Images folder (root only — don't ignore docs/public/images/)
+/images/