Remove references to sensAI, update .gitignore [skip ci]

docs/.gitignore

@@ -1,5 +1,4 @@
 /_toc.yml
 /jupyter_execute
 /conf.py
-/sensai
-/build
+/_build

docs/autogen_rst.py

@@ -6,8 +6,8 @@ from typing import Optional, List
 
 log = logging.getLogger(os.path.basename(__file__))
 
-TOP_LEVEL_PACKAGE = "sensai"
-PROJECT_NAME = "sensAI"
+TOP_LEVEL_PACKAGE = "serena"
+PROJECT_NAME = "Serena"
 
 def module_template(module_qualname: str):
     module_name = module_qualname.split(".")[-1]