docs: add DataTable example "Batch selection with controlled toolbar" (#1447)

* docs(inline-notification): add `NotificationActionButton` to Component API

* docs(data-table): rename example "Selectable with batch actions"

* docs(data-table): add example "Batch selection with controlled toolbar"

* docs(notification): remove note on minimum Svelte version

This banner is redundant since the minimum Svelte version is displayed in the README and on the home page of the docs.

docs/src/pages/framed/DataTable/DataTableBatchSelectionToolbarControlled.svelte

@@ -0,0 +1,63 @@
+<script>
+  import {
+    DataTable,
+    Toolbar,
+    ToolbarContent,
+    ToolbarBatchActions,
+    Button,
+  } from "carbon-components-svelte";
+  import TrashCan from "carbon-icons-svelte/lib/TrashCan.svelte";
+
+  const headers = [
+    { key: "name", value: "Name" },
+    { key: "port", value: "Port" },
+    { key: "rule", value: "Rule" },
+  ];
+
+  let rows = [
+    { id: "a", name: "Load Balancer 3", port: 3000, rule: "Round robin" },
+    { id: "b", name: "Load Balancer 1", port: 443, rule: "Round robin" },
+    { id: "c", name: "Load Balancer 2", port: 80, rule: "DNS delegation" },
+    { id: "d", name: "Load Balancer 6", port: 3000, rule: "Round robin" },
+    { id: "e", name: "Load Balancer 4", port: 443, rule: "Round robin" },
+    { id: "f", name: "Load Balancer 5", port: 80, rule: "DNS delegation" },
+  ];
+
+  let active = false;
+  let selectedRowIds = [];
+
+  $: console.log("active", active);
+  $: console.log("selectedRowIds", selectedRowIds);
+</script>
+
+<DataTable
+  selectable
+  batchSelection="{active}"
+  bind:selectedRowIds
+  headers="{headers}"
+  rows="{rows}"
+>
+  <Toolbar>
+    <ToolbarBatchActions
+      bind:active
+      on:cancel="{(e) => {
+        e.preventDefault();
+        active = false;
+      }}"
+    >
+      <Button
+        icon="{TrashCan}"
+        disabled="{selectedRowIds.length === 0}"
+        on:click="{() => {
+          rows = rows.filter((row) => !selectedRowIds.includes(row.id));
+          selectedRowIds = [];
+        }}"
+      >
+        Delete
+      </Button>
+    </ToolbarBatchActions>
+    <ToolbarContent>
+      <Button on:click="{() => (active = true)}">Edit rows</Button>
+    </ToolbarContent>
+  </Toolbar>
+</DataTable>