feat: add --api OpenAPI build mode with docs/api scheme and lib-prefixed nav

docforge.nav.yml

@@ -1,26 +1,30 @@
-home: index.md
+home: lib/index.md
 groups:
   Loaders:
-    - loaders/index.md
-    - loaders/griffe_loader.md
+    - lib/loaders/index.md
+    - lib/loaders/griffe_loader.md
   Models:
-    - models/index.md
-    - models/module.md
-    - models/object.md
-    - models/project.md
+    - lib/models/index.md
+    - lib/models/module.md
+    - lib/models/object.md
+    - lib/models/project.md
   Navigation:
-    - nav/index.md
-    - nav/spec.md
-    - nav/resolver.md
-    - nav/mkdocs.md
+    - lib/nav/index.md
+    - lib/nav/spec.md
+    - lib/nav/resolver.md
+    - lib/nav/mkdocs.md
   Renderers:
-    - renderers/index.md
-    - renderers/base.md
-    - renderers/mkdocs_renderer.md
-    - renderers/mcp_renderer.md
+    - lib/renderers/index.md
+    - lib/renderers/base.md
+    - lib/renderers/mkdocs_renderer.md
+    - lib/renderers/mcp_renderer.md
   CLI:
-    - cli/index.md
-    - cli/main.md
-    - cli/commands.md
-    - cli/mcp_utils.md
-    - cli/mkdocs_utils.md
+    - lib/cli/index.md
+    - lib/cli/main.md
+    - lib/cli/commands.md
+    - lib/cli/api_utils.md
+    - lib/cli/mcp_utils.md
+    - lib/cli/mkdocs_utils.md
+icon:
+  logo: material/file-document-multiple
+  repo: fontawesome/brands/github