chore: update version to 0.16.0 for v0.16.0 release

Author: phernandez

src/basic_memory/__init__.py

@@ -1,7 +1,7 @@
 """basic-memory - Local-first knowledge management combining Zettelkasten with knowledge graphs"""
 
 # Package version - updated by release automation
-__version__ = "0.15.3.dev42+36149d6"
+__version__ = "0.16.0"
 
 # API version for FastAPI - independent of package version
 __api_version__ = "v0"