feat: convert to an astro application (!9)

Reviewed-on: https://codeberg.org/nhcarrigan/docs/pulls/9
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

astro.config.mjs

@@ -0,0 +1,33 @@
+import { defineConfig } from 'astro/config';
+import starlight from "@astrojs/starlight";
+
+import { navigation } from "./src/components/navigation.ts";
+
+export default defineConfig({
+  integrations: [starlight({
+    title: "Naomi's Documentation",
+    sidebar: navigation,
+    tableOfContents: true,
+    description: "Helpful documentation we want to share with everyone.",
+    social: {
+      codeberg: "https://codeberg.org/nhcarrigan",
+      github: "https://github.com/nhcarrigan",
+      discord: "https://chat.nhcarrigan.com"
+    },
+    head: [
+      {
+        tag: "script",
+        attrs: {
+          type: "text/javascript",
+          id: "hs-script-loader",
+          async: true,
+          defer: true,
+          src: "//js.hs-scripts.com/47086586.js"
+        }
+      }
+    ],
+    customCss: [
+      "./src/styles/style.css"
+    ]
+  })]
+});