add basics docs using starlight taking most things from README

docs/.gitignore

@@ -0,0 +1,18 @@
+# build output
+dist/
+# generated types
+.astro/
+
+# dependencies
+node_modules/
+
+# logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+
+# environment variables
+.env
+.env.production

docs/astro.config.mjs

@@ -0,0 +1,41 @@
+import starlight from '@astrojs/starlight';
+import { defineConfig } from 'astro/config';
+
+// https://astro.build/config
+export default defineConfig({
+  integrations: [
+    starlight({
+      title: 'showbridge',
+      favicon: '/favicon.ico',
+      social: {
+        github: 'https://github.com/jwetzell/showbridge',
+      },
+      sidebar: [
+        {
+          label: 'showbridge',
+          autogenerate: { directory: '/showbridge' },
+        },
+        {
+          label: 'Guides',
+          autogenerate: { directory: 'guides' },
+        },
+        {
+          label: 'Reference',
+          autogenerate: { directory: 'reference' },
+        },
+        { label: 'Demo', link: 'https://demo.showbridge.io/', attrs: { target: '_blank' } },
+        {
+          label: 'More Docs',
+          items: [
+            { label: 'Lib JSDocs', link: 'https://docs.showbridge.io/lib/', attrs: { target: '_blank' } },
+            {
+              label: 'Config JSON Schema',
+              link: 'https://docs.showbridge.io/schema/config',
+              attrs: { target: '_blank' },
+            },
+          ],
+        },
+      ],
+    }),
+  ],
+});