docs: update docs for the foreign inline list

Author: yaroslav8765

adminforth/documentation/docs/tutorial/07-Plugins/03-ForeignInlineList.md

@@ -72,9 +72,96 @@ Add to your `'adminuser'` resource configuration the plugin instance:
 }
 ```
 
-You can use `modifyTableResourceConfig` callback to modify what columns to show in the list and filter of the foreign table.
+You can use the `modifyTableResourceConfig` callback to modify which columns to show in the list and filter of the foreign table.
 
 ![alt text](ForeignInlineList.png)
 
 > 👆 To make plugin work, the specified resource (defined with `foreignResourceId`) should have one (and only one) column that refers to the current resource on which you add a plugin.
-> In our case we add plugin to `adminuser` resource, so the `aparts` resource should have one column with `foreignResource.resourceId` equal to `adminuser` resourceId.
+> In our case we add plugin to `adminuser` resource, so the `aparts` resource should have one column with `foreignResource.resourceId` equal to `adminuser` resourceId.
+
+## Default filters
+
+If you need to add default filters for the foreign resource based on your current record (for example show apartment only from Italy, when user have country Italy), you can use defaultFilters callback:
+>👆 This example won't work until you'll add counrty field in your adminuser resource and it's only for demonstrating concept of callback
+
+```ts title="./resources/adminuser.ts"
+
+  ...
+
+  new ForeignInlineListPlugin({
+
+    ...
+      //diff-add
+      defaultFilters: (record: any) => {
+        //diff-add
+        return [
+          //diff-add
+          {
+            //diff-add
+            field: "country",
+            //diff-add
+            operator: AdminForthFilterOperators.EQ,
+            //diff-add
+            value: record.country,
+            //diff-add
+          }
+          //diff-add
+        ]
+        //diff-add
+      }
+
+    ...
+
+  })
+
+  ...
+
+```
+
+>👆It also makes sense to modify the table resource and hide the country field from filters, because this value is hardcoded and equals the country from the record:  
+
+
+```ts
+
+  ...
+
+  new ForeignInlineListPlugin({
+
+    ...
+
+    //diff-add
+    modifyTableResourceConfig: (resourceConfig: AdminForthResource) => {
+      //diff-add
+      const column = resourceConfig.columns.find((c: AdminForthResourceColumn) => c.name === 'country')!.showIn = {
+        //diff-add
+        list: true,
+        //diff-add
+        show: true,
+        //diff-add
+        edit: true,
+        //diff-add
+        create: true,
+        //diff-add
+        filter: false
+        //diff-add
+      };
+      //diff-add
+    },
+
+    defaultFilters: (record: any) => {
+      return [
+        {
+          field: "country",
+          operator: AdminForthFilterOperators.EQ,
+          value: record.country,
+        }
+      ]
+    }
+
+    ...
+
+  })
+
+  ...
+  
+```