fix: add Packs to navbar, reorder docs sidebar by importance

Nav: Docs | Layouts | Packs | Lab
Sidebar: Getting Started → Core → Vault → Reference →
Components → Content → Typography → Packs

Promotes ASW-unique features (Vault, Reference) above
standard web framework docs (Typography, Content).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

site/content/docs/content/_index.md

@@ -1,4 +1,4 @@
 ---
 title: "Content"
-weight: 25
+weight: 35
 ---

site/content/docs/core/_index.md

@@ -1,4 +1,4 @@
 ---
 title: "Core"
-weight: 20
+weight: 15
 ---

site/content/docs/reference/_index.md

@@ -1,4 +1,4 @@
 ---
 title: "Reference"
-weight: 40
+weight: 25
 ---

site/content/docs/typography/_index.md

@@ -1,4 +1,4 @@
 ---
 title: "Typography"
-weight: 15
+weight: 40
 ---

site/content/docs/vault/_index.md

@@ -1,4 +1,4 @@
 ---
 title: "Vault"
-weight: 45
+weight: 20
 ---

site/data/nav.yml

@@ -5,6 +5,9 @@ items:
   - name: Layouts
     url: /layouts/
     weight: 2
+  - name: Packs
+    url: /docs/packs/overview/
+    weight: 3
   - name: Lab
     url: /lab/
-    weight: 3
+    weight: 4