TreeView (#725)

* feat(tree-view): add TreeView

* fix(tree-view): select initial active node, correct typedefs

* docs(tree-view): update examples

* chore(tree-view): add test for types

* docs(tree-view): rename example

* docs(tree-view): improve docs

* docs(tree-view): refine examples

* docs: fix invalid syntax

* chore: rebuild component index/api

* docs(layout): increase height of sidenav menu [ci skip]

docs/src/pages/components/TreeView.svx

@@ -0,0 +1,48 @@
+<script>
+  import { InlineNotification } from "carbon-components-svelte";
+  import Preview from "../../components/Preview.svelte";
+</script>
+
+### Default
+
+The `children` prop accepts an array of child nodes. Each node should contain `id` and `text` properties.
+
+Optional properties include `disabled`, `expanded`, `icon`, and `children`.
+
+A parent node contains `children` while a leaf node does not.
+
+<InlineNotification svx-ignore title="Note:" kind="info" hideCloseButton>
+  <div class="body-short-01">Every node must have a unique id.</div>
+</InlineNotification>
+
+<FileSource src="/framed/TreeView/TreeView" />
+
+### Initial active node
+
+The active node can be set through `activeId`.
+
+<FileSource src="/framed/TreeView/TreeViewActive" />
+
+### Compact size
+
+Set `size` to `"compact"` to use the compact variant.
+
+<FileSource src="/framed/TreeView/TreeViewCompact" />
+
+### With icons
+
+To render a node with an icon, define an `icon` property with a Carbon Svelte icon as its value.
+
+<FileSource src="/framed/TreeView/TreeViewIcons" />
+
+### Initial expanded nodes
+
+Set `expanded` to `true` on nodes that should be expanded by default.
+
+<FileSource src="/framed/TreeView/TreeViewExpanded" />
+
+### Initial multiple selected nodes
+
+Initial multiple selected nodes can be set using `selectedIds`.
+
+<FileSource src="/framed/TreeView/TreeViewMultiselect" />