chore: stop tracking environment-specific public/storage symlink

The committed symlink pointed to an absolute, machine-specific path
(/var/www/InvoicePlane-v2/...), breaking on every other checkout.
Deployments should create it via `php artisan storage:link` instead.

Also fix the .gitignore pattern (drop trailing slash) since it only
matched directories and never actually caught the symlink, which is
how it got force-committed in the first place.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: 2 people

.gitignore

@@ -1,6 +1,6 @@
 # Laravel – Core
 /public/fonts/
-/public/storage/
+/public/storage
 /storage/framework/
 /storage/generated-json/
 /storage/logs/