Feature/issues 14876 add footer content tables docs

packages/tables/docs/10-advanced.md

@@ -268,6 +268,39 @@ public function table(Table $table): Table
         ]);
 ```
 
+## Add content to table footer
+
+You can add a footer to a table using the `$table->contentFooter()` method:
+
+```php
+use Filament\Tables\Table;
+
+public function table(Table $table): Table
+{
+    return $table
+        ->contentFooter(view('tables.footer'))
+        ->columns([
+            // ...
+        ]);
+}
+```
+
+Be careful because you'll need to add a `<td>` element in your view, with the number of columns.
+
+Note that this is not necessary if you're using `Split` layout for your columns.
+
+This is how your view should be structured:
+```php
+@props([
+    'columns',
+    'records'
+])
+
+<td colspan="{{ count($columns) }}">
+    Footer content
+</td>
+```
+
 ## Polling table content
 
 You may poll table content so that it refreshes at a set interval, using the `$table->poll()` method: