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

docforge.nav.yml

@@ -1,29 +1,32 @@
-home: index.md
+home: lib/index.md
 groups:
   Core API:
-    - ingestion/index.md
-    - ingestion/reader.md
+    - lib/ingestion/index.md
+    - lib/ingestion/reader.md
   Domain Models:
-    - models/index.md
-    - models/message.md
-    - models/thread.md
+    - lib/models/index.md
+    - lib/models/message.md
+    - lib/models/thread.md
   Provider Adapters:
-    - adapters/index.md
-    - adapters/base.md
-    - adapters/gmail.md
+    - lib/adapters/index.md
+    - lib/adapters/base.md
+    - lib/adapters/gmail.md
   Authentication & Storage:
-    - auth/index.md
-    - auth/base.md
-    - auth/google.md
-    - credentials/index.md
-    - credentials/store.md
-    - credentials/pickle.md
-    - credentials/redis.md
+    - lib/auth/index.md
+    - lib/auth/base.md
+    - lib/auth/google.md
+    - lib/credentials/index.md
+    - lib/credentials/store.md
+    - lib/credentials/pickle.md
+    - lib/credentials/redis.md
   Normalization & Parsing:
-    - parsers/index.md
-    - parsers/body.md
-    - parsers/headers.md
-    - parsers/subject.md
+    - lib/parsers/index.md
+    - lib/parsers/body.md
+    - lib/parsers/headers.md
+    - lib/parsers/subject.md
   Configuration & Errors:
-    - config.md
-    - exceptions.md
+    - lib/config.md
+    - lib/exceptions.md
+icon:
+  logo: material/inbox
+  repo: fontawesome/brands/github