docs: nest lib docs under docs/lib with lib-prefixed nav

docforge.nav.yml

@@ -1,16 +1,19 @@
-home: index.md
+home: lib/index.md
 groups:
   Core API:
-    - core/index.md
-    - core/content.md
-    - core/parser.md
-    - core/scraper.md
+    - lib/core/index.md
+    - lib/core/content.md
+    - lib/core/parser.md
+    - lib/core/scraper.md
   HTML Handling:
-    - html/index.md
-    - html/parser.md
-    - html/scraper.md
+    - lib/html/index.md
+    - lib/html/parser.md
+    - lib/html/scraper.md
   PDF Handling:
-    - pdf/index.md
-    - pdf/client.md
-    - pdf/parser.md
-    - pdf/scraper.md
+    - lib/pdf/index.md
+    - lib/pdf/client.md
+    - lib/pdf/parser.md
+    - lib/pdf/scraper.md
+icon:
+  logo: material/book-open-page-variant
+  repo: fontawesome/brands/github