fix(docs): complete Astro 7 upgrade [Codex] (#354)

Astro 7 requires a compatible Starlight release and content-collection
configuration changes. The original Dependabot update left Starlight's
Astro 5 peer requirement in place, so npm ci could not resolve the
dependency graph.

- Upgrade @astrojs/starlight to 0.41.10, compatible with Astro 7.
- Migrate the Starlight content config to docs/content.config.ts and use
docsLoader().
- Update sidebar autogeneration to Starlight's current group syntax.
- Group Astro and Starlight updates under Dependabot's npm
configuration.

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Josh Vlk <josh@vlkpack.com>

Author: dependabot[bot]

.github/dependabot.yml

@@ -5,14 +5,14 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+    groups:
+      astro-and-starlight:
+        patterns:
+          - "astro"
+          - "@astrojs/starlight"
 
   # Manage GitHub Actions dependencies
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "weekly"
-    groups:
-      astro-and-starlight:
-        patterns:
-          - "astro"
-          - "@astrojs/starlight"

astro.config.mjs

@@ -53,7 +53,7 @@ export default defineConfig({
         },
         {
           label: "Contributing",
-          autogenerate: { directory: "contributing" },
+          items: [{ autogenerate: { directory: "contributing" } }],
         },
         {
           label: "API Documentation",

docs/content/config.ts docs/content.config.tsdocs/content/config.ts renamed to docs/content.config.ts

@@ -1,6 +1,7 @@
 import { defineCollection } from "astro:content";
+import { docsLoader } from "@astrojs/starlight/loaders";
 import { docsSchema } from "@astrojs/starlight/schema";
 
 export const collections = {
-  docs: defineCollection({ schema: docsSchema() }),
+  docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
 };