feat: add docs index redirect to default page

Redirect /docs to /docs/what-is-openboot with 307 (temporary) to allow changing the default landing page later.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Author: fullstackjam

src/routes/docs/+page.server.ts

@@ -0,0 +1,5 @@
+import { redirect } from '@sveltejs/kit';
+
+export function load() {
+	redirect(307, '/docs/what-is-openboot');
+}