DOC: ignore unneeded directories and databases

Author: agriyakhetarpal

.gitignore

@@ -10,6 +10,7 @@ __pycache__
 *.egg-info
 dist
 build
+_build
 .installed.cfg
 
 # Installer logs
@@ -19,6 +20,11 @@ pip-log.txt
 .coverage
 .tox
 
+# Sphinx documentation
+doc/_build/
+doc/build/
+.jupyterlite.doit.db
+
 # Editors
 .idea
 .project