document the debug component

examples/official-site/documentation.sql

@@ -30,6 +30,7 @@ SELECT my_column_1 AS row_level_parameter_1, my_column_2 AS row_level_parameter_
 
 This page documents all the components provided by default in SQLPage and their parameters.
 Use this as a reference when building your SQL application.
+If at any point you need help, you can ask for it on the [SQLPage forum](https://github.com/lovasoa/SQLpage/discussions).
 
 If you have some frontend development experience, you can also create your own components, by placing
 [`.handlebars`](https://handlebarsjs.com/guide/) files in a folder called `sqlpage/templates` at the root of your server.

examples/official-site/sqlpage/migrations/06_debug.sql

@@ -0,0 +1,14 @@
+-- Insert the http_header component into the component table
+INSERT INTO component (name, description, icon)
+VALUES (
+        'debug',
+        'Display all of the row-level parameters passed to the component. Useful for debugging: just replace the name of the component you want to debug with ''debug''.',
+        'bug'
+    );
+-- Insert an example usage of the http_header component into the example table
+INSERT INTO example (component, description, properties)
+VALUES (
+        'debug',
+        'At any time, if you are confused about what data you are passing to a component, just replace the component name with ''debug'' to see all the parameters that are passed to it.',
+        JSON('[{"component": "debug"}, {"x": "y", "z": 42}, {"a": "b", "c": null}]')
+    );