docs: Add ARC documentation TOC file

b/30114799

Change-Id: I397f4712c82628f1b7aa4565fb5ab40381f9f5e2
(cherry picked from commit 129012530ffae6d3d52ba0f093ade0f6a8afce1b)
diff --git a/docs/html/topic/arc/_book.yaml b/docs/html/topic/arc/_book.yaml
new file mode 100644
index 0000000..ad83ba9
--- /dev/null
+++ b/docs/html/topic/arc/_book.yaml
@@ -0,0 +1,9 @@
+toc:
+- title: Optimize Apps for Chromebooks
+  path: /topic/arc/index.html
+- title: Loading Apps on Chromebooks
+  path: /topic/arc/sideload.html
+- title: Chrome OS Device Support for Apps
+  path: /topic/arc/device-support.html
+- title: App Manifest Compatibility for Chromebooks
+  path: /topic/arc/manifest.html
\ No newline at end of file