Update MANIFEST.in

Author: chanicpanic

MANIFEST.in

@@ -1,2 +1,10 @@
+# By default, all files tracked by git are included in the sdist via setuptools-scm
+# This manifest is used to exclude certain files and include files from git submodules
 recursive-exclude .github *
+recursive-exclude docs/ide *
+exclude .gitignore .gitmodules .pre-commit-config.yaml
+
+# Include nearley grammars from the nearley submodule
+# Many of them are used by tests/test_nearley/test_nearley.py
 recursive-include tests/test_nearley/nearley *.ne
+include tests/test_nearley/nearley/LICENSE.txt