[Doc] Add Soft Delete Documentation

Author: djhi

docs/BulkSoftDeleteButton.md

@@ -0,0 +1,80 @@
+---
+layout: default
+title: "The BulkSoftDeleteButton Component"
+---
+
+# `<BulkSoftDeleteButton>`
+
+Soft-deletes the selected rows. To be used inside [the `<DataTable bulkActionButtons>` prop](https://marmelab.com/react-admin/DataTable.html#bulkactionbuttons).
+
+![A bulk soft delete button in a `<DataTable>`](https://react-admin-ee.marmelab.com/assets/BulkSoftDeleteButton.png)
+
+## Usage
+
+`<BulkSoftDeleteButton>` reads the selected record ids from the `ListContext`, and the current resource from `ResourceContext`, so in general it doesn’t need any props:
+
+```tsx
+import * as React from 'react';
+import { BulkExportButton, DataTable } from 'react-admin';
+import { BulkSoftDeleteButton } from '@react-admin/ra-soft-delete';
+
+const PostBulkActionButtons = () => (
+    <>
+        <BulkExportButton />
+        <BulkSoftDeleteButton />
+    </>
+);
+
+export const PostList = () => (
+    <List>
+        <DataTable bulkActionButtons={<PostBulkActionButtons />}>
+            ...
+        </DataTable>
+    </List>
+);
+```
+
+## Props
+
+| Prop              | Required | Type                                    | Default                                    | Description                                                                                                                          |
+|-------------------|----------|-----------------------------------------|--------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------|
+| `confirmContent`  | Optional | React node                              | -                                          | Lets you customize the content of the confirm dialog. Only used in `'pessimistic'` or `'optimistic'` mutation modes                  |
+| `confirmTitle`    | Optional | `string`                                | -                                          | Lets you customize the title of the confirm dialog. Only used in `'pessimistic'` or `'optimistic'` mutation modes                    |
+| `confirmColor`    | Optional | <code>'primary' &#124; 'warning'</code> | 'primary'                                  | Lets you customize the color of the confirm dialog's "Confirm" button. Only used in `'pessimistic'` or `'optimistic'` mutation modes |
+| `label`           | Optional | `string`                                | 'ra-soft-delete.action.soft_delete'        | label or translation message to use                                                                                                  |
+| `icon`            | Optional | `ReactElement`                          | `<DeleteIcon>`                             | iconElement, e.g. `<CommentIcon />`                                                                                                  |
+| `mutationMode`    | Optional | `string`                                | `'undoable'`                               | Mutation mode (`'undoable'`, `'pessimistic'` or `'optimistic'`)                                                                      |
+| `mutationOptions` | Optional | `object`                                | null                                       | options for react-query `useMutation` hook                                                                                           |
+| `successMessage`  | Optional | `string`                                | 'ra-soft-delete.notification.soft_deleted' | Lets you customize the success notification message.                                                                                 |
+
+**Tip:** If you choose the `'pessimistic'` or `'optimistic'` mutation mode, a confirm dialog will be displayed to the user before the mutation is executed.
+
+## `successMessage`
+
+On success, `<BulkSoftDeleteButton>` displays a "XX elements deleted" notification in English. `<BulkSoftDeleteButton>` uses two successive translation keys to build the success message:
+
+- `resources.{resource}.notifications.soft_deleted` as a first choice
+- `ra-soft-delete.notification.soft_deleted` as a fallback
+
+To customize the notification message, you can set custom translation for these keys in your i18nProvider.
+
+**Tip**: If you choose to use a custom translation, be aware that react-admin uses the same translation message for the `<SoftDeleteButton>`, so the message must support [pluralization](https://marmelab.com/react-admin/TranslationTranslating.html#interpolation-pluralization-and-default-translation):
+
+```tsx
+const englishMessages = {
+    resources: {
+        posts: {
+            notifications: {
+                soft_deleted: 'Post archived |||| %{smart_count} posts archived',
+                // ...
+            },
+        },
+    },
+};
+```
+
+Alternately, pass a `successMessage` prop:
+
+```tsx
+<BulkSoftDeleteButton successMessage="Posts deleted successfully" />
+```