docs(wiki): added more rules and explanation on how to use the prompt in docforge wiki

docs/wiki/03_conventions.md

@@ -20,13 +20,16 @@ Key rules:
 3. Use `Args:`, `Returns:`, `Raises:`, `Yields:`, `Notes:`, and `Example:`
    sections at function and method level.
 4. Always update the matching `.pyi` stub alongside the `.py` implementation.
+5. Every distributable package ships a `py.typed` marker so type checkers
+   consume the authored signatures instead of `Any`.
 
 ---
 
-## `.pyi` stubs
+## `.pyi` stubs and `py.typed`
 
 Every module ships a matching `.pyi` stub kept in sync with the `.py`
-implementation. When signatures change, update both files.
+implementation. When signatures change, update both files. Packages expose a
+`py.typed` marker so consumers and type checkers use the authored signatures.
 
 ---