fix docs with src layout

Author: amorison

mkdocs.yml

@@ -29,7 +29,7 @@ nav:
     - devs/maintainers.md
 
 watch:
-  - stagpy
+  - src/
 
 plugins:
   - search

scripts/gen_ref_pages.py

@@ -7,7 +7,7 @@
 nav = mkdocs_gen_files.Nav()
 
 root = Path(__file__).parent.parent
-src = root
+src = root / "src"
 
 for path in sorted((src / "stagpy").rglob("*.py")):
     module_path = path.relative_to(src).with_suffix("")